Mesh 3 - Triangulation IO and Save and load C3t3 features

[ange-clement]

Summary of Changes

Enable writing and reading of 1D features (edges) of Mesh_complex_3_in_triangulation_3.
The Triangulation_3 writing and loading have been moved to CGAL::IO::export_triangulation_3 and CGAL::IO::import_triangulation_3

Tasks:

• Move Triangulation_3 writing and loading (operator<</>>)
• Make Triangulation_3::file_input use the writing and loading (remove duplicated code)
• Add 1D features to polyhedron demo

Release Management

• Affected package(s): Mesh_3
• Issue(s) solved (if any): fix Save and load complex edges of a C3T3 to/from the CGAL binary format #7780 , related to Mesh_3: Save/load c3t3 objects correctly #2359 , similar to Improve C3T3 IO #5151
• Feature/Small Feature (if any):
• Link to compiled documentation (obligatory for small feature) wrong link name to be changed
• License and copyright ownership:

[lrineau]

For the moment, the testsuite of Triangulation_3 fails. I tried on my machine:

ctest --test-dir build/RelWithDebInfo -L Triangulation_3 -j12

and the results was:

82% tests passed, 16 tests failed out of 89

Label Time Summary:
CGAL_build_system           =  24.20 sec*proc (2 tests)
Triangulation_3_Demo        =  20.06 sec*proc (1 test)
Triangulation_3_Examples    = 317.92 sec*proc (42 tests)
Triangulation_3_Tests       = 366.77 sec*proc (44 tests)

Total Test time (real) =  89.57 sec

The following tests FAILED:
        2134 - compilation of  simple_triangulation_3 (Failed)
        2135 - execution   of  simple_triangulation_3 (Not Run)
        5041 - compilation of  test_delaunay_3 (Failed)
        5042 - execution   of  test_delaunay_3 (Not Run)
        5045 - compilation of  test_delaunay_hierarchy_3 (Failed)
        5046 - execution   of  test_delaunay_hierarchy_3 (Not Run)
        5047 - compilation of  test_delaunay_hierarchy_3_old (Failed)
        5048 - execution   of  test_delaunay_hierarchy_3_old (Not Run)
        5051 - compilation of  test_regular_as_delaunay_3 (Failed)
        5052 - execution   of  test_regular_as_delaunay_3 (Not Run)
        5073 - compilation of  test_triangulation_3 (Failed)
        5074 - execution   of  test_triangulation_3 (Not Run)
        5075 - compilation of  test_io_triangulation_3 (Failed)
        5076 - execution   of  test_io_triangulation_3 (Not Run)
        5077 - compilation of  test_triangulation_serialization_3 (Failed)
        5078 - execution   of  test_triangulation_serialization_3 (Not Run)

See our wiki documentation on CTest.

[ange-clement]

@lrineau @janetournois This PR is ready to be reviewed.

[sloriot]

Runtime error:
https://cgal.geometryfactory.com/CGAL/testsuite/CGAL-6.0-Ic-177/SMDS_3/TestReport_lrineau_ArchLinux-clang-CXX20-Release.gz

[sloriot]

Test failing in 6.0-Ic-305

See here