chore: Drop Python 3.9 support

[BulkBeing]

Drop Python 3.9 support. Make 3.10 as the minimum version

[codecov]

Codecov Report

❌ Patch coverage is 95.76271% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.50%. Comparing base (a83067c) to head (5862b4a).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ow/pynumaflow/accumulator/servicer/task_manager.py	70.00%	2 Missing and 1 partial ⚠️
...flow/pynumaflow/reducer/servicer/async_servicer.py	83.33%	0 Missing and 1 partial ⚠️
...pynumaflow/reducestreamer/servicer/task_manager.py	83.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #322      +/-   ##
==========================================
+ Coverage   94.00%   94.50%   +0.49%     
==========================================
  Files          66       66              
  Lines        3087     3055      -32     
  Branches      156      156              
==========================================
- Hits         2902     2887      -15     
- Misses        138      140       +2     
+ Partials       47       28      -19     

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[vigith]

Interesting, Python now has match :)