Add maintenance::dependency to merge_request_templates

See merge request !1067



Merged-by: Dan Davison <ddavison@gitlab.com>
Approved-by: Dan Davison <ddavison@gitlab.com>
Co-authored-by: John McDonnell <jmcdonnell@gitlab.com>

Fix mutation of original command when masking secrets

See merge request !1069



Merged-by: Andrejs Cunskis <acunskis@gitlab.com>
Approved-by: Matthias Käppler <mkaeppler@gitlab.com>

Update ci base image and run base checks on different ruby versions

See merge request !1068



Merged-by: Andrejs Cunskis <acunskis@gitlab.com>
Approved-by: Edgars Bralitis <ebralitis@gitlab.com>