TLS KeyUpdate messages are not allowed in QUIC

TLS KeyUpdate messages are not allowed in QUIC

We already disallowed the sending of TLS KeyUpdate messages. We also treat
the receipt of a TLS KeyUpdate message as an unexpected message.

RFC 9001 section 6:
Endpoints MUST treat the receipt of a TLS KeyUpdate message as a connection
error of type 0x010a, equivalent to a fatal TLS alert of unexpected_message;
see Section 4.8.

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21686)