Add vtkIOLegacy package

[stdcm]

• this package is needed for VtkPolyhedralMeshIOService

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.25%. Comparing base (c812cbb) to head (30c85da).
Report is 10 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1760   +/-   ##
=======================================
  Coverage   70.25%   70.25%           
=======================================
  Files        2257     2257           
  Lines      162078   162084    +6     
  Branches    18668    18668           
=======================================
+ Hits       113869   113876    +7     
+ Misses      41452    41449    -3     
- Partials     6757     6759    +2     

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