NPS Survey: Update use cases to be a free-form field
Created by: umpox
Description
This PR removes the preset list of use cases and instead pushes a free-form text input.
Related Slack discussion: https://sourcegraph.slack.com/archives/C89KCDK5J/p1656432592299519?thread_ts=1656409366.862879&cid=C89KCDK5J
Still exploring what returns the most valuable engagement, for this reason (and for simplicity) I've kept it as otherUseCase
. This is essentially what the "Other" checkbox was for previously, and it serves the same purpose.
https://user-images.githubusercontent.com/9516420/177808652-ee4862d9-a5b0-4844-9e6d-f872120318f9.mp4
Test plan
Tested locally through sg start