feat: Update to liboqs 0.12.0 (#272) #1043

Job	Run time
ci (macos-latest, stable, true)	7m 29s
ci (macos-latest, stable, false)	7m 26s
ci (macos-latest, beta, true)	6m 54s
ci (macos-latest, beta, false)	6m 22s
ci (macos-latest, nightly, true)	6m 42s
ci (macos-latest, nightly, false)	7m 19s
ci (ubuntu-latest, stable, true)	11m 41s
ci (ubuntu-latest, stable, false)	10m 9s
ci (ubuntu-latest, beta, true)	11m 56s
ci (ubuntu-latest, beta, false)	11m 50s
ci (ubuntu-latest, nightly, true)	9m 38s
ci (ubuntu-latest, nightly, false)	11m 23s
ci (windows-latest, stable, true)	13m 29s
ci (windows-latest, stable, false)	13m 10s
ci (windows-latest, beta, true)	12m 3s
ci (windows-latest, beta, false)	11m 29s
ci (windows-latest, nightly, true)	12m 1s
ci (windows-latest, nightly, false)	12m 26s
	3h 3m 27s

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