Create Annual/Quarterly True Up Products By GitLab Tier

# SKU Request Summary

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Provide a brief description of what this SKU will be used for.
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## SKU Requirements

In order to expedite your request, please complete all of the following information.
Any questions about this template or this request can be directed to @amandarueda in the comments of this issue.

* [X] SKU Name:
   - True-Up (Quarterly) - Self-Managed - Ultimate
   - True-Up (Annually) - Self-Managed - Ultimate
   - True-Up (Quarterly) - Self-Managed - Premium
   - True-Up (Annually) - Self-Managed - Premium
   - True-Up (Quarterly) - SaaS - Ultimate
   - True-Up (Annually) - SaaS - Ultimate
   - True-Up (Quarterly) - SaaS - Premium
   - True-Up (Annually) - SaaS - Premium
   - True-Up (Quarterly) - Starter: $12/seat/quarter
   - True-Up (Annually) - Starter: $48/seat/year
   - True-Up (Quarterly) - Bronze: $12/seat/quarter
   - True-Up (Annually) - Bronze: $48/seat/year
* [x] SKU Code/ID:  [Annual and Quarterly True Up Products By GitLab Tier 2021.06.09](https://docs.google.com/spreadsheets/d/1u9Mo9corVyiysMjfgFqblCrs0GJRh0IcYSVI4FyJsPk/edit?usp=sharing)
* [x] Zuora Plan Name: [Annual and Quarterly True Up Products By GitLab Tier 2021.06.09](https://docs.google.com/spreadsheets/d/1u9Mo9corVyiysMjfgFqblCrs0GJRh0IcYSVI4FyJsPk/edit?usp=sharing)
* [x] Zuora Plan ID: [Annual and Quarterly True Up Products By GitLab Tier 2021.06.09](https://docs.google.com/spreadsheets/d/1u9Mo9corVyiysMjfgFqblCrs0GJRh0IcYSVI4FyJsPk/edit?usp=sharing)
* [X] Service type: `add-on`
* [X] Does this need to be purchase-able via CustomersDot? `No`
* [X] Does this service renew? `No`
     * [ ] If yes, what is the renewal cadence? `monthly | annually | other`
* [X] Should an email be sent indicating the subscription is coming to an end?: `No`
* [X] Is there a unit of measure, if so what? `Yes`  `Users`
* [X] Does this service provision anything? ``
     * [ ] If yes, please describe in detail what should be provisioned including the systems affected:
* [X] How soon do you need this SKU ? Timeline:  2021.07.01 go live of [Zuora Revenue SSP Refactor](https://gitlab.com/groups/gitlab-com/business-technology/enterprise-apps/-/epics/158) project
* [X] Who in Sales-Ops approved this request: @andrew_murray @jrabbits 
* [X] Link to originating Finance issue:  https://gitlab.com/gitlab-com/Finance-Division/finance/-/issues/4156
* [ ] Apply the appropriate `BTG Priority` label to this issue.

The Finance SKU Issue equivalent is still pending approval.  Zuora Product Catalog changes are typically configured only after all approvals have been satisfied.  EntApps will be moving forward with creating the proposed 8 new SKUs in Zuora Central Sandbox and Zuora API Sandbox 1 as part of the [Zuora Revenue SSP Refactor](https://gitlab.com/groups/gitlab-com/business-technology/enterprise-apps/-/epics/158) project.  In order to make the 2021.07.01 go-live date of the project, Fulfillment and EntApps have agreed to create this Issue in advance of completion of the Finance SKU Issue equivalent to earmark Fulfillment resources in June'21 to ensure these SKUs can go live on 2021.07.01.

Story points: 2.0