Check all frames for stateless reset conditions

Check all frames for stateless reset conditions

In writing the quic stateless reset test we found that the quic rx code
wasn't checking for stateless reest conditions, as the SRT frames were
getting discarded due to failed lcdim lookups.  Move the SRT check above
the lcdim lookup in the rx path to ensure we handle SRT properly in the
client.

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23384)