gitlab-ci: Update to latest ci-templates HEAD

Among other things, this increases robustness when copying a docker
image from the main Mesa project to a forked project, avoiding spurious
image rebuilds from scratch.

Also drop the comment about .gitlab-ci/lava-gitlab-ci.yml, it doesn't
include the templates anymore.

Reviewed-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3643>
1 file changed