Support separately trigger-able publishing process(es)
Summary
As part of gitlab-org&6424 (closed), we want the ability to separately trigger release process(es). More specifically, we need to support the "tagging" and "publishing" phase of Operator, so that tagged artifacts can be validated internally before we go and publish them to users.
Acceptance criteria
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Publishing process(es) are separately trigger-able, so that full product releases can be performed in a synchronous manner.
Edited by Mitchell Nielsen