[executors] fix: implement python3.9 specific plugin loading

[AndreyMarkinPPC]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 76.92308% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.31%. Comparing base (af99b02) to head (a0b2c39).
⚠️ Report is 15 commits behind head on main.

Files with missing lines	Patch %	Lines
libs/executors/garf_executors/fetchers.py	76.92%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #123      +/-   ##
==========================================
- Coverage   87.50%   87.31%   -0.20%     
==========================================
  Files          57       57              
  Lines        2625     2648      +23     
==========================================
+ Hits         2297     2312      +15     
- Misses        328      336       +8     

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