feat: remove python 3.9

[FilipPyrek]

No description provided.

[linear]

BLU-5451 Remove python 3.9 code from toolkit

[github-actions]

📦 Python package built successfully!

• Version: 1.2.1.dev3+293885d
• Wheel: deepnote_toolkit-1.2.1.dev3+293885d-py3-none-any.whl
• Install:

  pip install "deepnote-toolkit @ https://deepnote-staging-runtime-artifactory.s3.amazonaws.com/deepnote-toolkit-packages/1.2.1.dev3%2B293885d/deepnote_toolkit-1.2.1.dev3%2B293885d-py3-none-any.whl"

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.27%. Comparing base (4d76844) to head (995ab44).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #59   +/-   ##
=======================================
  Coverage   73.27%   73.27%           
=======================================
  Files          93       93           
  Lines        5193     5193           
  Branches      757      757           
=======================================
  Hits         3805     3805           
  Misses       1144     1144           
  Partials      244      244           

Flag	Coverage Δ
combined	73.27% <ø> (ø)

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