feat: Update to liboqs 0.12.0 (#272) #1042

Job	Run time
ci (macos-latest, stable, true)	6m 14s
ci (macos-latest, stable, false)	6m 58s
ci (macos-latest, beta, true)	7m 9s
ci (macos-latest, beta, false)	7m 24s
ci (macos-latest, nightly, true)	6m 56s
ci (macos-latest, nightly, false)	6m 51s
ci (ubuntu-latest, stable, true)	11m 39s
ci (ubuntu-latest, stable, false)	11m 47s
ci (ubuntu-latest, beta, true)	11m 56s
ci (ubuntu-latest, beta, false)	11m 45s
ci (ubuntu-latest, nightly, true)	9m 38s
ci (ubuntu-latest, nightly, false)	11m 22s
ci (windows-latest, stable, true)	12m 18s
ci (windows-latest, stable, false)	12m 54s
ci (windows-latest, beta, true)	12m 59s
ci (windows-latest, beta, false)	12m 30s
ci (windows-latest, nightly, true)	13m 17s
ci (windows-latest, nightly, false)	12m 33s
	3h 6m 10s

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