Setup support for managed runtime events (#87785)

Setup support for managed runtime events (#87785)

* preliminery managed runtime event support

* Linux fixes 1

* full portable threadpool support

* checkpoint before python script

* Additional GC event support

* NativeAOT to use sink threadpool file

* CI check

* Enable GC runtime tests

* Post main merge fixups

* change tests that run in CI

* Support native sinks for threading events

* Enable managed exceptions via eventpipe

* Move Exception event to EventPipe

* Add an empty exception event to disabled EventPipe

* make events do no-op in disabled eventpipe

* Update src/coreclr/nativeaot/Runtime/clretwallmain.h

Co-authored-by: Elinor Fung <elfung@microsoft.com>
* FB first stage

* Test change

* FB

* latest FB

* Pulled PR 88365

* FB

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Co-authored-by: Elinor Fung <elfung@microsoft.com>