[1.2.x] chore: add authorize job for pr build image workflow#3373

Zaperex merged 2 commits intoredhat-developer:1.2.xredhat-developer/rhdh:1.2.xfrom

openshift-cherrypick-robot:cherry-pick-3372-to-1.2.xopenshift-cherrypick-robot/backstage-showcase:cherry-pick-3372-to-1.2.xCopy head branch name to clipboard