Add msys2 option #139

Job	Run time
setup-alire (macos-12, nightly, false)	27s
setup-alire (macos-12, source, false)	4m 14s
setup-alire (macos-12, stable, false)	35s
setup-alire (macos-14, nightly, false)	19s
setup-alire (macos-14, source, false)	2m 22s
setup-alire (macos-14, stable, false)	21s
setup-alire (macos-latest, nightly, true)	20s
setup-alire (macos-latest, nightly, false)	21s
setup-alire (macos-latest, source, true)	3m 5s
setup-alire (macos-latest, source, false)	2m 17s
setup-alire (macos-latest, stable, true)	20s
setup-alire (macos-latest, stable, false)	22s
setup-alire (ubuntu-latest, nightly, false)	23s
setup-alire (ubuntu-latest, source, false)	3m 23s
setup-alire (ubuntu-latest, stable, false)	19s
setup-alire (windows-latest, nightly, true)	2m 48s
setup-alire (windows-latest, nightly, false)	1m 18s
setup-alire (windows-latest, source, true)	6m 47s
setup-alire (windows-latest, source, false)	4m 34s
setup-alire (windows-latest, stable, true)	2m 21s
setup-alire (windows-latest, stable, false)	1m 15s
	38m 11s

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