Automate publishing to automation hub (#1616)

* Automate awx-operator publishing on operatorhub

* Use scripts from workflow branch
Previously it will use scripts from the release tag to do the release
If we have to fix up the scripts for any reason we would have to retag
This will allow us to modify the publishing script without having to retag the release.

NOTE: the commit in this PR was accidentally pushed to `devel` directly... merging this PR just for the record.