ci/radv: Lower stoney CTS load

ci/radv: Lower stoney CTS load

CTS runs on stoney are currently taking ~20min to complete, which seems
to have begun with the upgrade to CTS 1.3.5.0. This is a bit too long in
and of itself, but it means that - assuming zero contention - a job that
has to be retried because the machine hung can take 40 minutes.

Aim to drop this to 15min turnaround by lowering the overall fraction
from 1/8th of the CTS to 1/11th.

As the jobs we run have been reshuffled, this adds a lot more expected
fails. As most of them categorise easily into patterns, group the
failures together in the file. Non-strict wide lines has passed since we
last ran it; the other failures all group into existing classes seen
for a long time.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21791>