Revert "Merge branch 'release-tools/update-kas' into 'master'"

Purpose of revert

This reverts !163402 (merged) because the commit c29c5ba968d141237000185734baa95e122db80b no longer exists in the upstream repository: gitlab-org/cluster-integration/gitlab-agent@c29c5ba9

See gitlab-org/quality/engineering-productivity/master-broken-incidents#8075 (closed)

Milestone info

• I am reverting something in the current milestone. No changelog is needed, and I've added a ~"regression:*" label.
• I am reverting something in a different milestone. A changelog is needed, and I've removed the ~"regression:*" label.