Bump actions/setup-python from 6 to 7 #4262

Job	Run time
Prepare supported CodeQL environment matrix	5s
Run Guideline Recategorization tests	16s
Run release tests	23s
Run analysis report tests (2.21.4, codeql-cli/v2.21.4, codeql-bundle-v2.21.4)	6m 16s
	7m 0s

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