Also includes helper support to create a QUIC connection inside a test.
We wil use quicfaultstest to deliberately inject faulty datagrams/packets
to test how we handle them.
Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20030)
