Follow-Up (#874): Reduce script repetition for building and pushing e2e bundles to on-cluster e2e image registry

[everettraven]

          Instead of having these separate files sharing a lot of common scripting, can we instead just have one script with arguments and have each sub-folder contain the needed yaml?

Originally posted by @dtfranz in https://github.com/operator-framework/rukpak/pull/874#discussion_r1596066219

[github-actions[bot]]

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