Add check for unloaded types in GetAppDomainStaticAddress (#34677)

Add check for unloaded types in GetAppDomainStaticAddress (#34677)

Fixes #33367

When a module is unloaded, the managed objectref is collected during a GC before the profiler is notified that the module is unloading. That means if you call in to GetAppDomainStaticAddress between when the object is collected and when you are notified about the module unload (GarbageCollectionFinished is a place that will hit this every time) it will cause an AV from trying to use the null objectref.

This fix prevents this AV by checking to see if the object's loaderheap or managed loaderheap object ref are invalid first.