Align CustomersDot Orders to Zuora objects
## Related to OKRs
* https://gitlab.com/gitlab-com/gitlab-OKRs/-/work_items/3378+
## Resources
- [Account Data Architecture plan documentation](https://gitlab.com/gitlab-org/customers-gitlab-com/-/blob/main/doc/architecture/data_architecture.md)
- [Lucid chart](https://lucid.app/lucidchart/3eb534e8-35b3-47a4-a284-bc6d8984c82e/edit?invitationId=inv_761317ee-84f0-46a3-8b12-3c3a19aecdae&page=xv78vQuQCGfz#)
- [Orders Proposal](https://gitlab.com/gitlab-org/customers-gitlab-com/-/blob/main/doc/architecture/orders_proposal.md)
- [Orders Architecture Blueprint](https://docs.gitlab.com/ee/architecture/blueprints/cdot_orders/)
## Purpose
Breaking apart the `CustomersDot Order` table to more accurately reflect its representation of `Zuora Subscriptions + Trials`. In the future, we could explore moving the reference for GitLab Namespace from being stored on the Subscription (and Order) to a `Zuora Account`.
## Iterations
- https://gitlab.com/groups/gitlab-org/-/epics/11751+
- https://gitlab.com/groups/gitlab-org/-/epics/13630+
- https://gitlab.com/groups/gitlab-org/-/epics/11752+
- https://gitlab.com/groups/gitlab-org/-/epics/11753+
epic