drm/ci: uprev mesa version: fix kdl commit fetch

build-kdl.sh was doing a `clone --depth 1` of the default branch,
then checking out a commit that might not be the latest of that
branch, resulting in container build error.

mesa/mesa@5efa4d56

 fixes
kdl commit fetch issue. Uprev mesa in drm-ci to fix this.

This commit also updates the kernel tag and adds .never-post-merge-rules
due to the mesa uprev.

Tested-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Vignesh Raman <vignesh.raman@collabora.com>