New Requirements for Create Release Plan Feature to support non-APEX, extensions, and dashboard

[ladonnaq]

This epic will be used to track requirements needed to support release plans for non-APEX and extensions. Also, there field values that are updated manually during onboarding that should move to the "create a release plan" UI flow to ensure that the data values are in synch with the release plan and are valid.

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1. Improvements to the "create a release plan" experience to ensure process adherence, automate decision-making, and enhance data integrity #6262
   Central-EngSys Engagement Experience Epic +3
   
2. New initial Beta and new initial Stable SDKs need to be identified in the create a release plan flow #7492
   6 of 6
   Engagement Experience +1
   
3. Request an extension feature for API readiness and SDK release readiness app #6597
   Engagement Experience +1