python@3.9: update pip, setuptools

[dtrodrigues]

• Have you followed the guidelines for contributing?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing brew install <formula>)?

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Update to the latest pip and setuptools.

[dtrodrigues]

Canceling CI for now, pending resolution of pypa/pip#9506

[carlocab]

On ARM:

Error: 2 failed steps!
brew test --retry --verbose emscripten
brew test --retry --verbose tree-sitter

The tree-sitter failure appears to be from emscripten being broken.

[dtrodrigues]

11.0
Error: 9 failed steps!
brew test --retry --verbose asuka
brew test --retry --verbose creduce
brew test --retry --verbose geant4
brew test --retry --verbose glyr
brew test --retry --verbose howdoi
brew test --retry --verbose hyperkit
brew test --retry --verbose pinboard-notes-backup
brew test --retry --verbose qxmpp
brew test --retry --verbose treefrog


10.15
Error: 4 failed steps!
brew test --retry --verbose hyperkit
brew test --retry --verbose pinboard-notes-backup
brew test --retry --verbose qxmpp
brew test --retry --verbose treefrog


10.14
Error: 7 failed steps!
brew test --retry --verbose cp2k
brew test --retry --verbose glyr
brew test --retry --verbose howdoi
brew test --retry --verbose hyperkit
brew test --retry --verbose nwchem
brew test --retry --verbose swift
brew test --retry --verbose treefrog

[dtrodrigues]

Added failures to #66450 (comment), none seem related to the python upgrade.

[BrewTestBot]

@dtrodrigues has triggered a merge.