QUIC APL: Create QUIC CHANNEL up front rather than deferring creation

QUIC APL: Create QUIC CHANNEL up front rather than deferring creation

We switch to instantiating the QUIC_CHANNEL up front at QCSO
instantiation time. This creates the QUIC_STREAM_MAP early and makes it
easy for us to allocate streams prior to connection initiation. The role
(client or server) is determined at QCSO allocation time and cannot be
changed.

SSL_set_connect/accept_state() are still modelled but their usage must
be consistent with the chosen SSL_METHOD which dictates which role is
being used.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20765)