Require claim form facility description

[kellyi]

Overview

• adjust model & add migration to make the claim a facility form
  facility description a required field
• update client to indicate that facility description is a required
  field on the claim a facility form
• update test for validation function

Connects #678

Demo

Testing Instructions

• ./scripts/resetdb then sign in as c1 and turn on claim a facility
• sign out then sign in to the app as c2
• search for a facility and open the claim form
• verify that the facility description claim form field is required in the UI and that you can save the form successfully

Checklist

• fixup! commits have been squashed
• CI passes after rebase
• CHANGELOG.md updated with summary of features or fixes, following Keep a Changelog guidelines

[jwalgran]

Tested. Works well.

I am going to fix the conflict and merge this in the interest of expediting a release.

[jwalgran]

This required a merge migration because it was created in parallel with #680.