crypto/internal/mlkem768: update to final FIPS 203
Main changes are the domain separator in KeyGen, dropping support for
the extended decapsulation key encoding in favor of seeds (see
https://words.filippo.io/ml-kem-seeds/), and documentation changes.
Change-Id: I8773034929094b3242aa39ac6e9d007c2bc94e63
Reviewed-on: https://go-review.googlesource.com/c/go/+/621975 Reviewed-by: Daniel McCarney <daniel@binaryparadox.net>
Auto-Submit: Filippo Valsorda <filippo@golang.org> Reviewed-by: Russ Cox <rsc@golang.org> Reviewed-by: Roland Shoemaker <roland@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>