Enable C# scripting on Mono

this will cache compilation end analyzer info in diagnostic service so that
it can be cheap except the very first time that most likely done by solution crawler.

added tests

Enable MS.CA.UnitTests on Mono

Add support for displaying reference kind in Find All References window.

Move to Mono Nightly

Ensure docker stopped on cancel

This makes the changes such that MS.CA.UnitTests can execute on Mono.

When a job is canceled while it is running the Mono leg then the docker
container will be left in a zombie state. Need to explicitly clean this
up in a canceled step.

Merge conditional fact files

Updates for running roslyn tests on Mono

Switch to version of the array expansion with correct whitespace that doesn't break xunit runner's console handling

Refactor tests.sh for clarity and to eliminate shellcheck warnings. Add support for using mono --debug to run tests. Put usage instructions at the top of the script.

Update Unix contrib document

Add parameter CodefixProvider: Fix argument list handling of local functions 

Fix #29390, add space after tuple type and identifier

The Ubuntu image with enhanced mode support is now built into the
Hyper-V create experience. Update the documentation to reflect that
instead of pointing to the old manual way.