Prevent editing of reports not in "Draft" or "Needs Action" mode

[jasalisbury]

As a specialist, I want my reports to not be editable after submitting for approval, so I can be sure of what the manager is approving

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Once a report has been submitted we do not want that report to be editable (except for the managerNotes and the status field). This will ensure we don't get into a strange situation where a manager approves an incomplete report.

For more context https://gsa-tts.slack.com/archives/C017RJ4GEET/p1612543608107300

Acceptance Criteria:

• Report fields are only editable by authors when the report is in "Draft" or "Needs Action" status. managerNotes and status can still be updated by the manager once the report has been submitted
• Any automatic report updating/saving is only enabled when the report has a status of "Draft" or "Needs Action"
• For submitted reports the review page for authors is updated to allow authors to revoke the submission moving the report back to "Draft"