Expose an SSLNamedGroup for mlkem768x25519 #3994

Job	Run time
Build & test (ubuntu-latest, 1.76.0, debug)	13m 31s
Build & test (ubuntu-latest, stable, debug)	13m 50s
Build & test (ubuntu-latest, nightly-2024-09-01, debug)	13m 18s
Build & test (macos-14, 1.76.0, debug)	11m 49s
Build & test (macos-14, stable, debug)	11m 44s
Build & test (macos-14, nightly-2024-09-01, debug)	12m 44s
Build & test (windows-latest, 1.76.0, debug)	22m 16s
Build & test (windows-latest, stable, debug)	24m 36s
Build & test (windows-latest, nightly-2024-09-01, debug)	22m 45s
Build & test (ubuntu-latest, stable, release)	19m 45s
Benchmark / Benchmark	16m 5s
	3h 2m 23s

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