Enable Portable ThreadPool events to be written using NativeRuntimeEventSource (...

Enable Portable ThreadPool events to be written using NativeRuntimeEventSource (#47829)

* match up the GUID

* why is this returning nothing

* Make ThreadPool emit events via NativeRuntimeEventSource

* found error...

* hack around having duplicate events generated

* make portable threadpool fire events through nativeruntimeeventsource

* make the initializer live in correct namespace

* EventListener tests are passing now

* make native QCall endpoints that sink into LTTng

* send events through XplatEventLogger sink

* Fix merge error

* double registration

* fix callback not getting handled when lttng is enabled

* cleanup 1

* rename file

* remove stale comments

* remove stale comment

* undo useless change

* fix broken EventListener

* apply code review feedback

* fix windows build

* fix incorrect qcall

* fix up ifdefs for Windows builds

* fix ifdef

* put back removed code

* tests pass now

* Fix NativeRuntimeEventSource not getting enabled for lttng

* Add some more comments

* Add comment in generated code

* fix mono build

* PR feedback

* fix typo

* code review feedback