Fix CI in macos & move out to mamba #1171

Job	Run time
canceller	2s
tests-Unix-CLI (ubuntu-20.04, 7, 3.8)	9m 13s
tests-Unix-GUI (ubuntu-20.04, 5.9.5, 7)	4m 44s
tests-Windows-CLI (mingw64, x86_64, 3.8)	12m 8s
tests-Unix-CLI (ubuntu-20.04, 11, 3.9)	10m 1s
tests-Unix-GUI (ubuntu-20.04, 5.15.2, 11)	7m 57s
tests-Windows-CLI (ucrt64, ucrt-x86_64, 3.8)	12m 9s
tests-Unix-CLI (macos-12, 3.8)	12m 20s
tests-Unix-GUI (ubuntu-22.04, 5.15.2, 12)	6m 24s
tests-Windows-GUI (mingw64, x86_64)	12m 8s
tests-Unix-CLI (macos-13, 3.9)	12m 19s
tests-Unix-GUI (macos-12, 5.9.5)	5m 59s
tests-Windows-GUI (ucrt64, ucrt-x86_64)	12m 11s
tests-Unix-GUI (macos-13, 5.15.2)	9m 23s
tests-windows-latest-pacman (mingw64, x86_64)	2m 7s
tests-windows-latest-pacman (ucrt64, ucrt-x86_64)	1m 49s
	2h 10m 54s

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