Update Django admin views for bulk moderation ergonomics

[dhruvkb]

Fixes

Fixes #3842 by @stacimc
Fixes #3843 by @stacimc
Fixes #3844 by @stacimc

Description

1. This PR adds a filter by decision ID to the sidebar of the sensitive media and deleted media list views. Using this filter the list can be quickly narrowed down to all the meida affected by one decision, making it easier to operate on them again, as a bulk.

   

2. This PR also updates the decision list view to add a single/bulk decision filter.

   

3. Finally the PR links to the sensitive media or deleted media list views from the single decision page, automatically populating the filter parameter described in point 1 above.

Testing Instructions

0. Check out the PR and run the dev server.
1. Create some reports and take decisions on them from the single media view or take decisions on media items directly using bulk moderation actions from the media list view.
2. Go to the sensitive media list and filter by a decision ID. You should only UUIDs for media that were affected by that decision.
3. Go to the deleted media list and filter by a decision ID. You should only see UUIDs for media that were affected by that decision.
4. Go the decision list view. Filter the decisions by single or bulk. Based on your actions in step 1, you will see a subset of decisions.
5. Click on a deindexing decision, you will see a "View deleted" button in top right, clicking which takes you to the pre-filtered deleted media list view.
6. Click on a sensitive marking decision, you will see a "View sensitive" button in the top right, clicking which tkaes you to the pre-filtered sensitive media list view.

Checklist

• My pull request has a descriptive title (not a vague title likeUpdate index.md).
• My pull request targets the default branch of the repository (main) or a parent feature branch.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.
• I ran the DAG documentation generator (ov just catalog/generate-docs for catalog
  PRs) or the media properties generator (ov just catalog/generate-docs media-props
  for the catalog or ov just api/generate-docs for the API) where applicable.

Developer Certificate of Origin

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[zackkrida]

Works great! Minor comments (you've already addressed one of my typical comments favoring verbosity over potentially-ambiguous brevity), but LGTM.