WIP: test pushing image to plural registry

[davidspek]

Summary

Building and pushing images to the plural registry is broken. This PR is used to test and debug this.

Test Plan

Checklist

• [ ] If required, I have updated the Plural documentation accordingly.
• [ ] I have added tests to cover my changes.
• [ ] I have added a meaningful title and summary to convey the impact of this PR to a user.
• [ ] I have added relevant labels to this PR to help with categorization for release notes.