Only reload projects that need and populate test runner

[TheAngryByrd]

• Previously, on any project change or dependency like project.assets.json, we would reload the whole solution. This changes it to only do the projects that have changed.
• Also contains: Run parse for tests #1081
• Also Respects AutomaticWorkspaceInit in AdaptiveLSP. This will fix issues with loading solutions too early for clients that shouldn't need it.

[baronfel]

Thanks for all of this - should be a great thing for adaptive users!