feat: Add `mirror` and `mirror-token` inputs for custom Python distri… #2

Job	Run time
Test setup-python (ubuntu-22.04)	1m 9s
Test setup-python (ubuntu-24.04-arm)	1m 2s
Test setup-python (windows-latest)	1m 27s
Test setup-python (macos-15-intel)	10m 13s
Test setup-python (ubuntu-latest)	54s
Test setup-python (macos-latest)	1s
Test setup-python (ubuntu-22.04-arm)	53s
	15m 39s

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