The slips-file should use the plural form of skip, otherwise it doesn't
end up being used.
We also had some tests that were supposed to be skipped in the expected
failures. Let's remove them, and add a new failure that should have been
turned into a skip to the list as well.
Fixes: eff8a3517d ("panvk: Enable CI on G610")
Acked-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32460>