Improve provisioning and onboarding of new sales-assisted SaaS subscribers
## Problem
There are a number of steps a GitLab.com customer with a sales-assisted order must take to complete provisioning of their subscription.
* 2020 Video walkthrough of flow: https://youtu.be/Wex_YD37Dkk
* UPDATED 2022 video walkthrough of flow: https://youtu.be/rg8liZIQ2Mo
Related issue with a lot of good examples of issues: https://gitlab.com/gitlab-com/sales-team/self-service/-/issues/69
## Proposal
Simplify and create a lower touch process once the purchase and subscription management activities within GitLab.com for all SaaS customers.
## :frame_photo: Design
[See UX issue](https://gitlab.com/gitlab-org/customers-gitlab-com/-/issues/2040/)
### Possible Iterations
1. We should identify how/if the solution can also be applied to subscriptions purchased by Resellers.
epic