Add reader XMLPartitionedDataSetCollectionReader

[tkoyama010]

Overview

Add composite reader CompositeDataReader class.

Note

• See https://gitlab.kitware.com/vtk/vtk/-/blob/v9.3.0/IO/Legacy/Testing/Python/TestCompositeWriterReader.py
• Part of add pythonic version of vtkPartitionedDataSetCollection #5377.

[codecov]

Codecov Report

Attention: Patch coverage is 86.15385% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 96.90%. Comparing base (8565c5f) to head (f919f80).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5898      +/-   ##
==========================================
- Coverage   96.93%   96.90%   -0.03%     
==========================================
  Files         140      140              
  Lines       24409    24472      +63     
==========================================
+ Hits        23660    23714      +54     
- Misses        749      758       +9     

[tkoyama010]

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