Build pre-populated Python distributions #2429

Job	Run time
Python 3.8 on Linux	2m 14s
Downstream builds with Python 3.8	45s
Python 3.9 on Linux	2m 20s
Downstream builds with Python 3.9	39s
CLI responsiveness with latest Python	2m 6s
Python 3.10 on Linux	2m 0s
Downstream builds with Python 3.10	47s
Downstream builds with Python 3.11	43s
Python 3.11 on Linux	1m 57s
Downstream builds with Python 3.12	48s
Python 3.12 on Linux	2m 23s
Python 3.8 on Windows	5m 4s
Python 3.9 on Windows	5m 48s
Python 3.10 on Windows	4m 24s
Python 3.11 on Windows	4m 37s
Python 3.12 on Windows	4m 54s
Python 3.8 on macOS	1m 51s
Python 3.9 on macOS	1m 32s
Python 3.10 on macOS	1m 38s
Python 3.11 on macOS	1m 14s
Python 3.12 on macOS	1m 21s
Report coverage	33s
check	2s
	49m 40s

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