Fix how we check whether events are enabled via LTTng (dotnet/coreclr#22707)

Fix how we check whether events are enabled via LTTng (dotnet/coreclr#22707)

* Fix how we check whether events are enabled via LTTng

* Add GCToEEInterface::UpdateGCEventStatus

* Fix build errors

* Finished hooking it up to post_gc

* Some comments about the event keyword/level detection logic

* Fix windows build

* Fix Prv provider keyword logic

* forgot to add one more ifdef

* Fix OSX build

* one more ifdef to fix

* Addressing PR feedback

* Update GCEventStatus at gc_heap::initialize_gc too

Commit migrated from https://github.com/dotnet/coreclr/commit/4685a1e008ad7cf4118e8778d89e63d87ca5b7b6