Change status after editing an Approved/Pending application

[marcellmueller]

Describe the task

This will be an issue with both the User Operator form and the Operations form once #375 is complete.

Industrial users can edit Approved or Pending applications and as is currently implemented their status stays the same after editing. This could be especially problematic for Approved applications as they can change all their form data after approval.

Acceptance Criteria

• [ ] Get confirmation from PO that we want to set Approved status to Pending once any changes are made to a form
• [ ] Update Operation form API to update status after editing a saved form
• [ ] Update Operator form API to update status after editing a saved form

Additional context

• Add any other context about the task here.
• Or here

[patriciarussellCAS]

@andrea-williams is this still relevant now that IRC won't be "approving" registration?