Set up Python in mergeback workflow #10797

Job	Run time
analyze-other (python)	59s
analyze-other (actions)	49s
check-codeql-versions	34s
analyze-javascript (ubuntu-24.04)	4m 19s
analyze-javascript (ubuntu-22.04, linked)	4m 28s
analyze-javascript (ubuntu-24.04, linked)	4m 11s
analyze-javascript (windows-2022)	5m 15s
analyze-javascript (windows-2025, linked)	5m 27s
analyze-javascript (ubuntu-22.04)	4m 16s
analyze-javascript (windows-2022, linked)	5m 20s
analyze-javascript (macos-13, linked)	10m 52s
analyze-javascript (macos-13)	11m 29s
analyze-javascript (macos-14, linked)	5m 36s
analyze-javascript (macos-14)	5m 57s
analyze-javascript (windows-2025)	5m 6s
analyze-javascript (macos-15, linked)	6m 41s
analyze-javascript (macos-15)	9m 5s
	1h 30m 24s

Provide feedback