Revive "FsharpSuite.tests reduction diet" => saves 29 minutes off slowest CI job

[T-Gro]

1.Reverts #14742 which moves out-of-proc Fsharp.Suite tests (Win only) to Componenent tests (all OSes).

• This gives us way better coverage for Linux and MacOs
• There is a visible reduction in CI runtimes for the 2 slowest jobs:
  • example BEFORE:
    
  • example AFTER:
    
    ====> This means 29 minutes off the slowest job

2. Make the tests non-flaky
   • The issue was in multi-emit FSI (MethodNotFound on a boundary between FSI_001 called from FSI_002)
   • Approach this by checking why it fails, and by doing a single pass script execution
3. Incorporate changes needed for the tests which are currently ignored (failing in the old Fsharp.Suite)

BONUS, learned while implementing:

1. Allow non-inline literals to be used as printf format #14670 introduced a regression which failed all implicit conversions from literal strings (e.g. to XNamespace or to XName). Enablement of the tests showed it
2. This behavior is now fixed here, the handling of constant strings depends on being format/not format and inline/static field => 4 cases
3. Probably since (a hypothesis only!) this change in MacOs 11 VM actions/runner-images@bf50e0d , a specific test using #r nuget: on MacOS started to fail. Disabling this test on MacOs for now, will troubleshoot on MacOs separately