Cleanup materials

[grospelliergilles]

• make a private version of public methods intented to be internal to Arcane.
• make the public version deprecated
• move MaterialComponentData in directory arcane/materials/internal

[codecov]

Codecov Report

Patch coverage: 89.65% and no project coverage change.

Comparison is base (fae37fd) 72.31% compared to head (ef48eb8) 72.32%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #792   +/-   ##
=======================================
  Coverage   72.31%   72.32%           
=======================================
  Files        1630     1630           
  Lines      122497   122498    +1     
=======================================
+ Hits        88588    88595    +7     
+ Misses      33909    33903    -6     

Impacted Files	Coverage Δ
...src/arcane/core/materials/MeshComponentPartData.cc	94.28% <ø> (ø)
arcane/src/arcane/materials/internal/AllEnvData.h	100.00% <ø> (ø)
arcane/src/arcane/materials/AllEnvData.cc	78.13% <57.14%> (ø)
arcane/src/arcane/materials/MeshComponentData.cc	95.55% <87.50%> (ø)
arcane/src/arcane/materials/MeshMaterial.cc	91.22% <87.50%> (ø)
arcane/src/arcane/materials/MeshEnvironment.cc	92.77% <93.75%> (ø)
...c/arcane/accelerator/RunCommandMaterialEnumerate.h	90.76% <100.00%> (ø)
...e/src/arcane/core/materials/ComponentItemVector.cc	89.18% <100.00%> (ø)
...ne/src/arcane/core/materials/ComponentItemVector.h	90.00% <100.00%> (-0.91%)	⬇️
...rc/arcane/core/materials/ComponentItemVectorView.h	90.47% <100.00%> (+1.00%)	⬆️
... and 7 more

... and 4 files with indirect coverage changes

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