Merge pull request #15626 from drwells/remove-la-vector

Remove LA::Vector.

diff --cc cmake/config/template-arguments.in
Simple merge

diff --cc include/deal.II/base/template_constraints.h
Simple merge

diff --cc include/deal.II/grid/grid_tools.h
Simple merge

diff --cc include/deal.II/lac/affine_constraints.templates.h
Simple merge

diff --cc include/deal.II/lac/la_parallel_vector.h
Simple merge

diff --cc include/deal.II/lac/read_write_vector.h
Simple merge

diff --cc source/fe/mapping_q_cache.cc
Simple merge

diff --cc source/non_matching/fe_values.cc
Simple merge

diff --cc source/non_matching/quadrature_generator.cc
Simple merge

diff --cc source/numerics/point_value_history.cc
Simple merge

diff --cc source/numerics/solution_transfer.cc
Simple merge