Added reviewer state options to submit review dropdown

What does this MR do and why?

Adds the new additional reviewer state options to the submit review dropdown.

Screenshots or screen recordings

When the project has approval password required it shows the password box like:

How to set up and validate locally

• Enable mr_request_changes feature flag
• Visit any merge request
• Start a new review
• Open Finish review dropdown

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

#428089 (closed)