Update moby/buildkit Docker tag to v0.17.0

See merge request https://gitlab.com/gitlab-org/build/CNG/-/merge_requests/2071



Merged-by: Jason Plum <jplum@gitlab.com>
Approved-by: Clemens Beck <cbeck@gitlab.com>
Approved-by: Jason Plum <jplum@gitlab.com>
Co-authored-by: GitLab Renovate Bot <gitlab-bot@gitlab.com>