Backport chart publishing verification and CI_TOOLS_VERSION bump to 9-9-stable

See merge request gitlab-org/charts/gitlab!5001

Merged-by: Jason Plum <jplum@gitlab.com>
Approved-by: Nailia Iskhakova <niskhakova@gitlab.com>
Approved-by: Jason Plum <jplum@gitlab.com>
Co-authored-by: Manjunath Bhadrannavar <mbhadrannavar@gitlab.com>

Changelog: changed

chore: bump gitlab-zoekt chart to 3.9.0 on 9-9-stable

See merge request gitlab-org/charts/gitlab!4959

Merged-by: Clemens Beck <cbeck@gitlab.com>
Approved-by: Hossein Pursultani <hpursultani@gitlab.com>
Approved-by: Clemens Beck <cbeck@gitlab.com>
Co-authored-by: Terri Chu <tchu@gitlab.com>

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