CP: Add python to allowed script extensions

[cdcme]

Cherry-picks #43467

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
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Additional details and impacted files

@@                    Coverage Diff                    @@
##             rc-minor-fleet-v4.84.0   #43485   +/-   ##
=========================================================
  Coverage                          ?   66.86%           
=========================================================
  Files                             ?     2579           
  Lines                             ?   207090           
  Branches                          ?     9241           
=========================================================
  Hits                              ?   138461           
  Misses                            ?    56027           
  Partials                          ?    12602           

Flag	Coverage Δ
backend	68.62% <ø> (?)

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