Add function to delete cypress crisp profiles

[annarhughes]

What changes did you make?

Added deleteCypressCrispProfiles function to clean up crisp profiles after cypress tests are run, similar to the existing deleteCypressTestUsers and deleteCypressFirebaseUsers functions.

Also adds additional endpoint DELETE /users/cypress-clean which is similar to DELETE /users/cypress but includes a deep clean of rogue firebase and crisp accounts without user db records. This endpoint can be called manually infrequently, but the default (called after each cypress test) is still /users/cypress which is faster

Why did you make the changes?

To clean up our crisp users after they're created during cypress testing, completing the deleteCypressTestUsers function