Prepare polyhedral mesh for parallel

[stdcm]

First step to prepare parallelism for polyhedral mesh. Add missing methods, but exchange items methods not implemented yet.

[codecov]

Codecov Report

Attention: Patch coverage is 4.16667% with 115 lines in your changes missing coverage. Please review.

Project coverage is 70.21%. Comparing base (07caef1) to head (fd601a6).

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
arcane/src/arcane/mesh/EmptyMeshModifier.h	0.00%	46 Missing ⚠️
arcane/src/arcane/mesh/PolyhedralMesh.cc	0.00%	40 Missing ⚠️
...rcane/src/arcane/tests/MeshPolyhedralTestModule.cc	0.00%	24 Missing ⚠️
arcane/src/arcane/mesh/PolyhedralMesh.h	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1816      +/-   ##
==========================================
- Coverage   70.25%   70.21%   -0.05%     
==========================================
  Files        2261     2261              
  Lines      162517   162602      +85     
  Branches    18714    18715       +1     
==========================================
- Hits       114172   114165       -7     
- Misses      41566    41662      +96     
+ Partials     6779     6775       -4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.