Draft: Updating MVC product principles

Why is this change being made?

Making updates to the definition of an MVC based on the product team conversation on 2/7/23. https://docs.google.com/document/d/19Gg3V_wG6QzewKop8Fs1F6qsKjetslMwABfml3zYswU/edit#bookmark=id.af3egmhgxqon

Check out this MR where we are modifying the intended use of Alpha and Beta.

Author Checklist

• Provided a concise title for this Merge Request (MR)
• Added a description to this MR explaining the reasons for the proposed change, per say why, not just what
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  • The when to get approval handbook section explains the workflow in more detail
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