mesh_shape: Fix resource group for meshes

[JafarAbdi]

Description

Fixes a bug causing RViz to print a ton of error messages about material not existing in the General resource group when adding a mesh to the planning scene

[rviz2-1] rviz2: Can't assign material Shape94Material to the ManualObject MeshShape_ManualObject0 because this Material does not exist in group General. Have you forgotten to define it in a .material script?
[rviz2-1] rviz2: Can't assign material Shape96Material to the ManualObject MeshShape_ManualObject1 because this Material does not exist in group General. Have you forgotten to define it in a .material script?
[rviz2-1] rviz2: Can't assign material Shape98Material to the ManualObject MeshShape_ManualObject2 because this Material does not exist in group General. Have you forgotten to define it in a .material script?
[rviz2-1] rviz2: Can't assign material Shape100Material to the ManualObject MeshShape_ManualObject3 because this Material does not exist in group General. Have you forgotten to define it in a .material script?
[rviz2-1] rviz2: Can't assign material Shape102Material to the ManualObject MeshShape_ManualObject4 because this Material does not exist in group General. Have you forgotten to define it in a .material script?
[rviz2-1] rviz2: Can't assign material Shape104Material to the ManualObject MeshShape_ManualObject5 because this Material does not exist in group General. Have you forgotten to define it in a .material script?
[rviz2-1] rviz2: Can't assign material Shape106Material to the ManualObject MeshShape_ManualObject6 because this Material does not exist in group General. Have you forgotten to define it in a .material script?

Checklist

• Required by CI: Code is auto formatted using clang-format
• Extend the tutorials / documentation reference
• Document API changes relevant to the user in the MIGRATION.md notes
• Create tests, which fail without this PR reference
• Include a screenshot if changing a GUI
• While waiting for someone to review your request, please help review another open pull request to support the maintainers

[codecov]

Codecov Report

Merging #672 (5099f70) into main (5ff36ac) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #672      +/-   ##
==========================================
+ Coverage   54.38%   54.38%   +0.01%     
==========================================
  Files         191      191              
  Lines       20100    20100              
==========================================
+ Hits        10929    10930       +1     
+ Misses       9171     9170       -1     

Impacted Files	Coverage Δ
...e/collision_detection_fcl/src/collision_common.cpp	74.64% <0.00%> (+0.25%)	⬆️

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