Simplify file statuses

[dcmcand]

Description of change
Simplified file statuses presented to user. The mapping is now

UPLOADING -> Uploading
UPLOADED -> Uploaded
UPLOAD_FAILED, QUEUING_FAILED -> Upload Failed
SCANNING_QUEUED, SCANNING -> Scanning
APPROVED -> Approved
REJECTED -> Rejected.

Once #317 is complete, then QUEUING_FAILED will be moved to Scanning since it will have retry for failed queuing.

How to test

1. Pull down changes.
2. Start the app
3. While the clamav instance is still starting add a grantee, click save draft, and upload a file
4. File status should display 'Uploaded'
5. Refresh the page, File status should display 'Scanning'
6. Wait for ClamAV to finish starting and for a success message from the worker.
7. Refresh the page and status should now say 'Approved'
8. Stop the redis instance (docker stop head-start-ttadp_redis_1)
9. Upload a new file
10. Status should be uploaded. It will stay uploaded until the request to que times out (approx 2 mins)
11. Go make a cup of coffee or tea
12. Come back and refresh the page. If status is still 'Updated ' then the request hasn't timed out yet
13. Refresh the page, status should now be 'Upload Failed'
    Note: if you start redis again within the timeout period then queuing will succeed and the job will get processed, so we currently have some resiliency there for dropouts.
    Issue(s)

• closes QA: Document upload failed without notification #310

Checklist

• Meets issue criteria
• Code tested
• Meets accessibility standards (WCAG 2.1 Levels A, AA)
• Documentation updated
  • API methods
  • Boundary and Data Flow Diagrams
  • Architectural Decision Records written for major infrastructure decisions with the Nygard template
  • OSCAL templates completed when security controls are implemented or modified

[rahearn]

🎉