TCVP-2786 and TCVP-3099: Fix dispute updates not clearing and showing on DCF

[karahanb]

Description

This PR includes the following proposed change(s):

• TCVP-2785 and TCVP-3099
• Fixed the issue with 'Dispute Updates' section on DCF page does not show all update requests.
• Added 'checkUserAssigned' flag to updateDispute endpoint for not checking user assignment to prevent 409 conflict error when updating an occam dispute as a result of processing update requests after accepting.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring / Documentation
• Version change

if your change is a breaking change, please add breaking change label to this PR

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

Does the change impact or break the Docker build?

• Yes
• No

If Yes: Has Docker been updated accordingly?

• Yes
• No

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• New and existing unit tests pass locally with my changes