Merge branch 'renovate/kubectl-30.x' into 'master'

Update dependency kubectl to v1.30.3

See merge request https://gitlab.com/gitlab-org/build/CNG/-/merge_requests/1924



Merged-by: Robert Marshall <rmarshall@gitlab.com>
Approved-by: Lucas Li <lli@gitlab.com>
Approved-by: Robert Marshall <rmarshall@gitlab.com>
Co-authored-by: GitLab Renovate Bot <gitlab-bot@gitlab.com>