Expose an SSLNamedGroup for mlkem768x25519 (#2102) #3998

Job	Run time
Build & test (ubuntu-latest, 1.76.0, debug)	13m 38s
Build & test (ubuntu-latest, stable, debug)	12m 59s
Build & test (ubuntu-latest, nightly-2024-09-01, debug)	13m 17s
Build & test (macos-14, 1.76.0, debug)	11m 57s
Build & test (macos-14, stable, debug)	12m 33s
Build & test (macos-14, nightly-2024-09-01, debug)	11m 4s
Build & test (windows-latest, 1.76.0, debug)	23m 31s
Build & test (windows-latest, stable, debug)	23m 20s
Build & test (windows-latest, nightly-2024-09-01, debug)	23m 37s
Build & test (ubuntu-latest, stable, release)	18m 42s
Benchmark / Benchmark	16m 18s
	3h 0m 56s

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