Fix failed tests for extract_boundary_mesh and add new test

Fix failed tests for extract_boundary_mesh and add new test

add codim_one/extract_boundary_mesh_15
  - The test checks whether extract_boundary_mesh produces correct results for 2d and 3d. In particular, it checks whether #7474 succesfully fixes #7467.

fix manifold/polar_manifold_04:
  - failed because of different vertex ordering in 2d and 3d with the new version in order to get consistent outward facing normals
  - contains a bug in itself in that the north and south poles are not properly excluded in 3d (only the origin is excluded in the code)
  -> solution: fix bug in test and update output file
All other failed tests have been fixed by updating the output file