PIMS-1594 Parent-Child Agency Relationship Limit

[dbarkowsky]

## 🎯 Summary [PIMS-1594](https://citz-imb.atlassian.net/browse/PIMS-1594?atlOrigin=eyJpIjoiYTBjMmI2NjE2MGU2NDA5ZjliZGIxZTFiNmI0M2E2OTIiLCJwIjoiaiJ9)

Intended to disallow multiple layers of parent/child relationships with agencies. It's either a parent, child, or neither.

Changes

• Add backend checks to prohibit bad parent agency assignments
• Change how parents/children are identified in the agencyOptions. Lost parent field (boolean) and replaced with parentId (number). Can check if it's a possible parent if it doesn't have a parentId.
• Allow certain cases where users can clear the agency. Couldn't clear the parent agency field before. Also allowed clearing the user agency when editing. We should probably restrict editing this field to admins only in another ticket.
• Add prop to allow for disabling the AutocompleteFormField.

🔰 Checklist

• [x] I have read and agree with the following checklist and am following the guidelines in our Code of Conduct document.

• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation where required.
• I have tested my changes to the best of my ability.
• My changes generate no new warnings.

[github-actions[bot]]

🚀 Deployment Information

The Express API Image has been built with the tag: 2460. Please make sure to utilize this specific tag when promoting these changes to the TEST and PROD environments during the API deployment. For more updates please monitor Image Tags Page on Wiki.

[github-actions[bot]]

🚀 Deployment Information

The React APP Image has been built with the tag: 2460. Please make sure to utilize this specific tag when promoting these changes to the TEST and PROD environments during the APP deployment. For more updates please monitor Image Tags Page on Wiki.

[codeclimate[bot]]

Code Climate has analyzed commit 89dcb1c5 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 94.5%.

View more on Code Climate.