Add experimental functions to change unique ids of items

[grospelliergilles]

This is a WIP and should not be used at the moment.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 32 lines in your changes missing coverage. Please review.

Project coverage is 70.64%. Comparing base (6f7ed28) to head (66781d1).
Report is 2 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...rcane/src/arcane/mesh/UnstructuredMeshUtilities.cc	0.00%	23 Missing ⚠️
arcane/src/arcane/mesh/ItemFamily.cc	0.00%	9 Missing ⚠️

❌ Your patch status has failed because the patch coverage (0.00%) is below the target coverage (50.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2022      +/-   ##
==========================================
- Coverage   70.66%   70.64%   -0.02%     
==========================================
  Files        2290     2290              
  Lines      167657   167688      +31     
  Branches    19309    19312       +3     
==========================================
- Hits       118468   118466       -2     
- Misses      42111    42144      +33     
  Partials     7078     7078              

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