Hit new endpoint to limit locations when creating new mobile workers

[AddisonDunn]

Product Description

Fixes QA-6985.

USH feature epic: link.

Original related PR: link.

Technical Summary

The form to create mobile workers is not using the LocationSelectWidget, and was hitting the old, location_search endpoint.

Feature Flag

Technically the code isn't behind a FF, but in order for locations to be limited in the dropdown a project would need to turn on the LOCATION_HAS_USERS and configure locations in accordance with this feature.

Safety Assurance

Safety story

• Tested locally, looks good
• This endpoint has been tested thoroughly by QA

Automated test coverage

This endpoint is tested in corehq/apps/locations/tests/test_views.py

Rollback instructions

• This PR can be reverted after deploy with no further considerations

Labels & Review

• Risk label is set correctly
• The set of people pinged as reviewers is appropriate for the level of risk of the change

[Jtang-1]

nice catch, could you also add in the description a link to your original PR that introduced this endpoint?

[AddisonDunn]

Sure