User Registration: step form question
# Summary
The purpose of this issue is to add a question to step one of registration that allows us to know which path to send users down. The question will state "I want to..."
* A. Setup a new team = (New organization & trial signup flow)
* B. Setup a new personal account = (New organization & no trial)
* C. Join an existing team = (default organization & no trial)
* D. Contribute to a public project on GitLab = (default organization & no trial)
# Designs
| Location | Form | New form dropdown open |
| ------ | ------ | ------ |
| `gitlab.com/-/trial_registrations/new` |  |  |
| `gitlab.com/users/sign_up` | | |
## [Figma link](https://www.figma.com/file/j4iQrJBq6D5VkmtGZ5zDYL/Growth---registration-updates?type=design&node-id=517%3A7083&mode=design&t=CCZyPG8e86iYX3iQ-1)
# Engineering
When implementing this work this question should be added to step one of registration for both `gitlab.com/-/trial_registrations/new` and `gitlab.com/users/sign_up`. This question can be added to step one of registration in production before the rest of the logic supporting new organizations (new Cells) and the default organization(existing Cell) described in `A` - `D` is live.
epic