Update the default version of core metadata to 2.3 (#1311) #2189

Job	Run time
CLI responsiveness with latest Python	2m 8s
Downstream builds with Python 3.8	37s
Python 3.8 on Linux	2m 57s
Downstream builds with Python 3.9	39s
Python 3.9 on Linux	3m 2s
Downstream builds with Python 3.10	37s
Python 3.10 on Linux	2m 59s
Downstream builds with Python 3.11	33s
Python 3.11 on Linux	3m 3s
Downstream builds with Python 3.12	46s
Python 3.12 on Linux	3m 11s
Python 3.8 on Windows	6m 53s
Python 3.9 on Windows	6m 42s
Python 3.10 on Windows	7m 35s
Python 3.11 on Windows	6m 1s
Python 3.12 on Windows	6m 7s
Python 3.8 on macOS	5m 25s
Python 3.9 on macOS	3m 36s
Python 3.10 on macOS	5m 16s
Python 3.11 on macOS	4m 9s
Python 3.12 on macOS	5m 12s
Report coverage	27s
check	3s
	1h 17m 58s

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