Add evidence_submissions table and run db migrate

[pmclaren19]

Summary

This pr is the first pr to merge some of the work from #20105.

This pr adds the db table evidence_submissions with all of the necessary fields through a migration file and includes the schema changes.

Related issue(s)

• Link to ticket created in va.gov-team repo here
• Link to draft pr that this is a part of here

What areas of the site does it impact?

Claim Status Tool

Acceptance criteria

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No error nor warning in the console.
• Events are being sent to the appropriate logging solution
• Documentation has been updated (link to documentation)
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Feature/bug has a monitor built into Datadog (if applicable)
• If app impacted requires authentication, did you login to a local build and verify all authenticated routes work as expected
• I added a screenshot of the developed feature

[stevenjcumming]

@pmclaren19 there's a merge conflict

[pmclaren19]

@pmclaren19 there's a merge conflict

Yes I've updated it a few times haha at this point was waiting for a reviewer so I don't have to keep updating it every hour! Should be good to review again @stevenjcumming !