ACK manager must avoid infinite probe time when waiting handshake confirmation

ACK manager must avoid infinite probe time when waiting handshake confirmation

According to RFC 9002, section 6.2.2.1 the client the client must keep PTO (probe
time out) armed if it has not seen HANDSHAKE_DONE quic message from server.
Not following RFC spec here may cause the QUIC session to stale during TLS handshake.

Fixes openssl/project#1266

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/28023)