Add msys2 option #115

Job	Run time
setup-alire (ubuntu-latest, stable, true)	21s
setup-alire (ubuntu-latest, stable, false)	29s
setup-alire (ubuntu-latest, nightly, true)	31s
setup-alire (ubuntu-latest, nightly, false)	20s
setup-alire (ubuntu-latest, source, true)	3m 6s
setup-alire (ubuntu-latest, source, false)	3m 29s
setup-alire (macos-12, stable, true)	35s
setup-alire (macos-12, stable, false)	32s
setup-alire (macos-12, nightly, true)	11s
setup-alire (macos-12, nightly, false)	11s
setup-alire (macos-12, source, true)	5m 6s
setup-alire (macos-12, source, false)	4m 7s
setup-alire (macos-14, stable, true)	46s
setup-alire (macos-14, stable, false)	46s
setup-alire (macos-14, nightly, true)	14s
setup-alire (macos-14, nightly, false)	11s
setup-alire (macos-14, source, true)	6m 7s
setup-alire (macos-14, source, false)	5m 26s
setup-alire (windows-latest, stable, true)	3m 31s
setup-alire (windows-latest, stable, false)	3m 12s
setup-alire (windows-latest, nightly, true)	3m 1s
setup-alire (windows-latest, nightly, false)	4m 43s
setup-alire (windows-latest, source, true)	6m 56s
setup-alire (windows-latest, source, false)	7m 17s
	1h 1m 8s

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