Initial project isolation support

[modmuss50]

This PR disables some none essential features to allow Loom to run with project isolation.

What doesnt work with project isolation:

• Applying AWs or TAWs from project dependencies that are mdos.
• Reading any Gradle property.
  • Project isolated replacement for findProperty gradle/gradle#28857
  • Or a custom property parser!? surely it cannot be the only solution.
• Sandbox support (doesnt matter, was mostly to help me test stuff)
• Remap jar with other projects mixin AP mappings. (An edge case that I might disable by default anyway)
  • Using TR to remap mixins solves this problem.

The multi mc version test has been rewritten to run with project isolation and configure on demand.