Enhance e2e (end-to-end) tests for Submission form

[tdonohue]

Describe the bug

Enhance the existing e2e tests in submission.cy.ts to include testing of additional submission features. These features may include:

• Verify all (default configured) Entity Type Submission forms load properly, and can be submitted.
• Verify proper behavior of authority control (autocomplete) or Entity search on Author field
• Verify up/down errors on Date field
• Verify search behavior for Publisher field
• For one multi-valued field
  • Verify "+ Add more" behavior works to add more entries
  • Verify entries can be reordered
  • Verify delete button works
• For Item/Publication, verify every field can be filled out / selected and the result submitted
• After file upload, verify that you can edit the file name/description & set embargoes or leases

Expected behavior

The Submission form actions should be more fully tested

Related work

Subticket of #3978