ci: Add the new timeout-prone softpipe-gl test to the skips list.

The NIR path does a whole lot more work on this testcase and we often time
out, even after the NIR validation speedup.

Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7279>
1 file changed