Store status of repository storage moves

What does this MR do?

#210041 (closed)

• Adds new table to store status of project repository moves with the intent to expose it to admins.
• Adds minimal state updates to UpdateRepositoryStorageService
• Future enhancements will include:
  • automatically cleaning up moved repositories gitaly#2618 (closed)
  • a basic API to retrieve state of a job
  • a dedicated API for moving project storage repositories.
• No changelog because this is not exposed anywhere yet.

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team