This placement is temporary. We will later introduce flags whether to
run the msbuild on Roslyn, to download CPC.

This code to work we need the patched CPC with the changes from
basoundr/CPCChangeToWorkWithPerf_3_21

Some code cleanup

Introduce AbsoluteInstance to run more than 1 testcase

With the AbsoluteInstance mentioned in the from and to event in the
scenarios.xml, Consumption can distinguish between the first event start
and the subsequent event start. The same with end events as well.

Use kernel event provider instead of custom provider

and exclude some temp files from git tracking

Currently we have metrics generated for one test.

Enable the tools that were included to run

This change expects all the tests to be under the Tests folder under the
Perf folder

and some refactorings

This introduces a helper ShellOutUsingShellExecute becuase ShellOut was
returning failure on Robocopy. The reason is, ProcessResult assumes that
success Exitcode for a process is always zero but for Robocopy the
exitcode 0 represents something else but not success.

Add classes to help run CPC

Run mutiple csharp compiler configurations

Clean-up skipped tests in Roslyn.Compilers.VisualBasic.Syntax.UnitTests.DLL

Move Mac testing to commit only

Move the trigger phrase generation code into a separate function.  This simplified the code
for adding a standard job.

Include [DynamicAttribute] for captured dynamic variables

There is a small product change to fix https://devdiv.visualstudio.com/defaultcollection/DevDiv/_workitems?_a=edit&id=111538 and enable corresponding unit-test.

Guard against EventListener dispose race

The underlying issue here is EventListener.DisposeOnShutdown has a race
condition if a new EventSource is added during an AppDomain or Process
exit.  When this occurs there is an unhandled exception during shutdown
due to a modified collection during enumeration that causes xunit to
falsely fail the run.

The type CDSCollectionETWBCLProvider triggers this bug in our tests.  It
is an EventSource for concurrent collections that is loaded on many
concurrent collection operations.  These operations are not triggered
directly in some of our tests and hence lead to the race.

This test guards against them force loading, albeit indirectly, the EventSource
instance of CDSCollectionETWBCLProvider.  Hence uses during shutdown
are just re-using this instance and don't trigger the race.

closes #8936

DryDock effort: enabled unit tests in GenerateMethodTests

Update nuget exe

Include test counts in JSON

The current nuget.exe doesn't support the netstandard TFM

Add portable compat references

Update binding redirects in the compiler server.

Clean-up skipped tests in Roslyn.Compilers.VisualBasic.CommandLine.UnitTests.DLL

Clean-up skipped tests in Roslyn.Compilers.CompilerServer.UnitTests.DLL

Send better metadata to server for cache tracking

DryDock Effort: Enabling Skipped tests for rename features