Add IUserDataList access in polyhedral mesh.

[stdcm]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 70.24%. Comparing base (6501665) to head (3ea8595).
Report is 3 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
arcane/src/arcane/mesh/PolyhedralMesh.h	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1795   +/-   ##
=======================================
  Coverage   70.24%   70.24%           
=======================================
  Files        2259     2259           
  Lines      162383   162379    -4     
  Branches    18705    18705           
=======================================
+ Hits       114062   114066    +4     
+ Misses      41548    41540    -8     
  Partials     6773     6773           

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