Clean environment solutions in DEV and PPE

[JonathanCrd]

Remove testing and empty solutions from both environments.

• [x] DEV
• [ ] PPE

[JonathanCrd]

Solutions deleted in DEV:

➖ Removed from solution but not deleted from environment ❌ Deleted from environment

• Empty Solution
  • EnvVar Test ❌
• Release Planner vNext
  • Release Planner app beta 3 vNext ➖
• Release Planner Current
  • Release Planner app ➖
• Test no permissions app
  • Testing no permissions ❌
• Mini Solution
  • Migrating existing ADO work items ➖
• ArchRevRecordingManagerTool
  • Dashboard (Empty CanvasApp) ❌
  • Dashboard (Empty Table) ❌
• Praveen Test
• test-huwe

There are other solutions that contain more items that seem to be deprecated or just created for testing purposes. I will update this issue once I clean them too.