Fix minidump generation - missing IP for exception stack frames (#115025)

This was caused by changes in PR #114582 where
Exception::GetStackTrace called GetThread() which throws an error exception in the
DAC. Changed the enummem.cpp code in ClrDataAccess::DumpManagedExcepObject() to call
the GetStackTrace overload that allows a NULL pCurrentThread parameter to be passed.

Author: Mike McLaughlin

src/coreclr/debug/daccess/enummem.cpp

@@ -561,7 +561,7 @@ HRESULT ClrDataAccess::DumpManagedExcepObject(CLRDataEnumMemoryFlags flags, OBJE
     // included in the dump.  When we touch the header and each element looking for the
     // MD this happens.
     StackTraceArray stackTrace;
-    exceptRef->GetStackTrace(stackTrace);
+    exceptRef->GetStackTrace(stackTrace, /*outKeepAliveArray*/ NULL, /* pCurrentThread */ NULL);
 
     // The stackTraceArrayObj can be either a byte[] with the actual stack trace array or an object[] where the first element is the actual stack trace array.
     // In case it was the latter, we need to dump the actual stack trace array object here too.