[CNG] Use GitLab version in helper images, replacing digest
Summary
Context: #3713 (closed)
Updating the helper images to use the GitLab version in the tag will have some benefits:
- We know the tagged container in alignment with the released application / chart version will work, and not be concerned about "which" variation.
- We no longer "stomp" along over the top of other tags.
Acceptance criteria
-
Tags for kubectl, alpine-certificates, and cfssl-self-sign images reference the GitLab version -
Release-tools sets global.gitlabVersion
in values.yaml that helper image templates can reference (#4075 (closed)) -
Digest references for these images are removed in values.yaml (!2878 (merged))
Edited by Mitchell Nielsen