[ISSUE #10040] Ignore flattened-pom.xml files generated by maven

[yx9o]

Fixes #10040 .

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48.89%. Comparing base (4aa6cdd) to head (14ed9de).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #10041      +/-   ##
=============================================
- Coverage      48.97%   48.89%   -0.08%     
+ Complexity     13352    13328      -24     
=============================================
  Files           1373     1373              
  Lines          99698    99700       +2     
  Branches       12886    12887       +1     
=============================================
- Hits           48824    48748      -76     
- Misses         44972    45026      +54     
- Partials        5902     5926      +24     

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