Description of problem:
If user triggers an optimized Capsule sync manually after publishing/promoting a content view containing docker repositories. The capsule sync task doesn't sync anything.

Steps to Reproduce:
1. Set "Sync Capsules after content view promotion" to No
2. Create and sync a docker repository, using only one tag
3. Create a content view and attach the docker repository to it. Publish and promote the content view.
4. Trigger an optimized capsule sync to sync the CV repositories for the first time to the Capsule.
5. In the docker repository page, include a new tag and sync it.
6. Publish and promote a new version of the content view.
7. Trigger an optimized capsule sync again

Actual results:
The optimized capsule sync resyncs after the new publish, to capture the new tags.

Expected results:
Optimized capsule sync should sync the newly published docker repositories.

Additional info:
Requesting Fix release for satellite 6.12.z