REGTESTS: quic: disable quic/ocsp_auto_update for now

REGTESTS: quic: disable quic/ocsp_auto_update for now

It was made from the split of the original one into the SSL and the QUIC
variant. However there's a catch: both use the same certificates which
includes the OCSP URL 127.0.0.1:12345, and both need to start a server
on that port. Depending on the number of parallel process and their
speed, they might very well work, or totally fail due to a binding
conflict and the fact that the test runs for a few seconds.

Let's disable the QUIC variant for now, since the whole point of the
test is to verify all the sequencing, the SSL one is greatly sufficient.
Maybe a better approach can be found later.