* Mechanical move of tests from src/coreclr/tests/src to src/tests

* Minimum changes to make CoreCLR tests build in the new location

(*) Path changes in the test build scripts;
(*) Modify runtime.yml filtering based on Nathan's and Santi's feedback;
(*) Fix runtime pipeline filtering clauses per Santi's PR feedback;
(*) Fix path to Coreclr.TestWrapper.csproj;
(*) Pass unprocessed build args to test wrapper creation;
(*) Fix missing $(TestRoot) on groups in Pri0 test build mode.

Thanks

Tomas

Commit migrated from https://github.com/dotnet/coreclr/commit/119cfe86d996aec5f81a2dae491e9c8c7f445bb5

Commit migrated from https://github.com/dotnet/coreclr/commit/1b92bb4ccb7c3deed5c2d3dedd55669e9ba9dd37

* Revert "Revert "Enable EventPipe across Unix and Windows (dotnet/coreclr#14772)" (dotnet/coreclr#15609)"

This reverts commit dotnet/coreclr@302005ca8ae14eade37ddf4ac6e900617c1c166a.

* Fix ARM build break

* Use more explicit references to resolve build failures

* Fix compat with python3

* Disable FeaturePerfTracing on Windows as it is not ready

* Disable test for incomplete functionality

* Fix test diabled patterns

* Add license header

* Use keyword types for managed code

* Add message prefix

* More precisly condition generation of eventing sources

* Remove erroneously added changes


Commit migrated from https://github.com/dotnet/coreclr/commit/c1bbdae7964b19b7063074d36e6af960f0cdc3a0