Fix MGTransferMatrixFree::interpolate_to_mg() for PBC

Merge pull request #12714 from peterrum/vt_point_values_docu

Extend the documentation of VT::point_values()

Merge pull request #12733 from peterrum/get_multigrid

Implement PreconditionMG::get_multigrid()

Merge pull request #12735 from Rombur/fix_cuda

Fix size of data copied to constant memory and add missing include

Merge pull request #12717 from bangerth/next

Use std::next instead of ++object.begin().

Merge pull request #12736 from bangerth/stack

Add a static_assert to DataOutStack.

Use std::prev in one place.

Also use std::next for ++object.begin(x).

Also use std::next for ++object.begin_active().

Use std::next instead of ++object.begin().

Declare std::iterator_traits for sparse matrix iterators.

Declare local difference_type for sparse matrix iterators.

Add a static_assert to DataOutStack.

Fix size of data copied to constant memory and add missing include

Merge pull request #12734 from gfcas/changelog_ginkgo_version

Add changelog entry for ginkgo 1.4.0 requirement

Add changelog entry for ginkgo 1.4.0 requirement

Implement PreconditionMG::get_multigrid()

Merge pull request #12732 from tamiko/boost_177_compatibility

Boost 1.77 compatibility: change order of includes

Boost 1.77 compatibility: change order of includes

Otherwise, including both header files in reverse order leads to a
compilation failure:

```
In file included from /usr/include/boost/geometry/index/detail/rtree/rstar/choose_next_node.hpp:25,
                 from /usr/include/boost/geometry/index/detail/rtree/rstar/rstar.hpp:15,
                 from /usr/include/boost/geometry/index/rtree.hpp:80,
                 from ../include/deal.II/numerics/rtree.h:29,
                 from ../include/deal.II/grid/grid_tools.h:49,
                 from ../include/deal.II/numerics/vector_tools_point_gradient.templates.h:22,
                 from ../source/numerics/vector_tools_point_gradient.cc:17:
/usr/include/boost/geometry/index/detail/algorithms/intersection_content.hpp: In function ‘bool boost::geometry::index::detail::disjoint_box_box(const Box&, const Box&, const boost::geometry::default_strategy&)’:
/usr/include/boost/geometry/index/detail/algorithms/intersection_content.hpp:35:32: error: ‘boost::geometry::strategy::disjoint’ has not been declared
   35 |     typedef typename strategy::disjoint::services::default_strategy<Box, Box>::type strategy_type;
      |                                ^~~~~~~~
/usr/include/boost/geometry/index/detail/algorithms/intersection_content.hpp:35:68: error: expected unqualified-id before ‘<’ token
   35 |     typedef typename strategy::disjoint::services::default_strategy<Box, Box>::type strategy_type;
      |                                                                    ^
/usr/include/boost/geometry/index/detail/algorithms/intersection_content.hpp:36:83: error: class template argument deduction failed:
   36 |     return geometry::detail::disjoint::disjoint_box_box(box1, box2, strategy_type());
```

Merge pull request #12703 from gfcas/cmake_ginkgo

Require GINKGO 1.4.0

Merge pull request #12730 from kronbichler/step26-fix

step-26: Remove stray newline in formula

step-26: Remove stray newline in formula

Merge pull request #12729 from bangerth/mutable

Make some static local variables mutable members.

Make some static local variables mutable members.

Merge pull request #12727 from slfuchs/fix-deadlock-particle-insertion

Add changelog entry

Merge pull request #12725 from Rombur/time_stepping

Fix a bug in EmbeddedExplicitRungeKutta default constructor

Merge pull request #12726 from bangerth/doc

Improve documentation of PolynomialsRaviartThomas a bit.

Fix bug in particle handler insertion

Fix a bug in ParticleHandler::insert_particles(const
std::vector<Point<spacedim>> &positions) that occurs when no particles
are inserted on some processors.

Improve documentation of PolynomialsRaviartThomas a bit.

Fix a bug in EmbeddedExplicitRungeKutta default constructor

- Fix a bug where some variables were not initialized.
- Fix documentation in RungeKutta
- Remove unused variable in ImplicitRungeKutta

Merge pull request #12711 from marcfehling/identities-nobug

Identity constraints in 3D are correct.

Merge pull request #12720 from peterrum/MGTwoLevelTransfer_unify

Unify structure of MGTwoLevelTransfer::prolongate_and_add() and ::restrict_and_add()

Merge pull request #12723 from peterrum/loop_over_active_or_level_cells

Simplify code in MGTwoLevelTransferImplementation by introducing a helper function

Merge pull request #12705 from peterrum/pft_create_description_from_triangulation_partition_levels

Allow to partition levels in TriangulationDescription::Utilities::create_description_from_triangulation()

Simplify code in MGTwoLevelTransferImplementation by introducing a helper function

Merge pull request #12722 from peterrum/restrict_and_add_zero_out_ghost_values

Move a zero_out_ghost_values

Merge pull request #12721 from peterrum/FineDoFHandlerView_names

Fix the name of some variables

Move a zero_out_ghost_values

Fix the name of some variables

Unify structure of MGTwoLevelTransfer::prolongate_and_add() and ::restrict_and_add()

Merge pull request #12716 from bangerth/identities-5

Change the return type of hp::FECollection::hp_*_dof_identities.

Extend the documentation of VT::point_values()

Merge pull request #12718 from peterrum/MGTwoLevelTransfer_cleanup

Clean up in MGTwoLevelTransfer

Allow to partition levels in TriangulationDescription::Utilities::create_description_from_triangulation()

Update cmake/modules/FindGINKGO.cmake

Co-authored-by: Marc Fehling <mafehling.git@gmail.com>

Merge pull request #12713 from peterrum/pft_create_description_from_triangulation_restructure_2

Restructure TriangulationDescription::Utilities::create_description_from_triangulation() 2

Merge pull request #12719 from marcfehling/unify-dofs-tests

New test for parallel dof unification algorithm.

Added new test `mpi/hp_unify_dof_indices_14`.

Added new test `mpi/hp_unify_dof_indices_13`.

Use `TestGrids::hyper_line` to avoid code duplication.

Clean up in MGTwoLevelTransfer

Change the return type of hp::FECollection::hp_*_dof_identities.

Merge pull request #12691 from bangerth/deprecate

Deprecate ArrayView functionality for tensors.

Restructure TriangulationDescription::Utilities::create_description_from_triangulation() 2

Merge pull request #12708 from bangerth/identities-4

Rewrite ensure_existence_and_return_dof_identities().

Merge pull request #12712 from peterrum/with_mpi

Rename tests with with_mpi=true

Rename tests with with_mpi=true

Add a changelog entry.

Deprecate ArrayView functionality for tensors.

Merge pull request #12709 from peterrum/is_artificial_on_level

Introduce CellAccessor::is_artificial_on_level()

Merge pull request #12707 from peterrum/range-based-loop

Replace loop by range-based loop

Rewrite ensure_existence_and_return_dof_identities().

Replace loop by range-based loop

Introduce CellAccessor::is_artificial_on_level()

Merge pull request #12710 from bangerth/identities-5

Short-circuit compute_hp_dof_identities() when possible.

Merge pull request #12702 from peterrum/setup_constraints_edge_multiple_components

Fix HangingNodes::setup_constraints() for multiple components

Identity constraints in 3D are correct.

Fix description of test `hp/identity_constraints_02`.

Merge pull request #12684 from bangerth/tensor-array-view

Introduce ParticleAccessor::set_properties() taking a Tensor.

Short-circuit compute_hp_dof_identities() when possible.

Add a changelog entry.

Fix HangingNodes::setup_constraints() for multiple components

Merge pull request #12706 from bangerth/identities-2

Minor changes to internal function arguments.

Merge pull request #12704 from peterrum/pft_create_description_from_triangulation_restructure

Restructure TriangulationDescription::Utilities::create_description_from_triangulation()

Update source/dofs/dof_handler_policy.cc

Co-authored-by: Marc Fehling <mafehling.git@gmail.com>

Minor changes to internal function arguments.

Merge pull request #12690 from bangerth/identities

Implement multiway DoF identities on vertices/lines/quads.

Add more tests.

Add a changelog entry.

Add a number of tests.

Restrcuture TriangulationDescription::Utilities::create_description_from_triangulation()

Implement multiway DoF identities on vertices/lines/quads.

Require GINKGO 1.4.0

Merge pull request #12696 from peterrum/p_mg_any_level

Extend MGTwoLevelTransfer::reinit_polynomial_transfer() so that it works on any refinement level without HN

Merge pull request #12700 from gfcas/typename_number

Fix typename number

Merge pull request #12698 from gfcas/dimension_mismatch

Update include/deal.II/numerics/vector_tools_rhs.templates.h

Co-authored-by: Daniel Arndt <arndtd@ornl.gov>

Update include/deal.II/numerics/vector_tools_rhs.templates.h

Co-authored-by: Daniel Arndt <arndtd@ornl.gov>

Fix typename number

Merge pull request #12676 from peterrum/pft_manifold_2

Remove special treatment of boundary cells

Indent

Merge pull request #12685 from bangerth/array-view-2

Avoid the use of ArrayView for Tensors in MPI::sum().

Merge pull request #12634 from tjhei/mg_transfer_bug

Fix MGTransferMatrixFree plain_copy bug

Merge pull request #12697 from lethe-cfd/tolerance_subdivided_cylinder

Add tolerance to subdivided_cylinder generator

AssertDimension macro in examples

Add tolerance to subdivided_cylinder generator

actually fix the problem

Extend MGTwoLevelTransfer::reinit_polynomial_transfer() so that it works on any refinement level without HN

Merge pull request #12493 from peterrum/MGTwoLevelTransfer_ls

Enable MGTwoLevelTransfer::reinit_geometric_transfer() for refinement levels

Enable MGTwoLevelTransfer::reinit_geometric_transfer() for refinment levels