Fix the amd64 cross-DAC stack unwinding (#114836)

* Move m_Context to the end of SoftwareExceptionFrame to fix cross-DAC

* Add comments and fix FaultingExceptionFrame on amd64

* Fix debug assert in DBI

* Back out FaultingExceptionFrame changes

Author: mikem8361

src/coreclr/debug/ee/debugger.cpp

@@ -2774,6 +2774,13 @@ DebuggerMethodInfo *Debugger::GetOrCreateMethodInfo(Module *pModule, mdMethodDef
     }
     CONTRACTL_END;
 
+#ifdef DACCESS_COMPILE
+    if (!HasLazyData())
+    {
+        return NULL;
+    }
+#endif // #ifdef DACCESS_COMPILE
+
     DebuggerMethodInfo *info = NULL;
 
     // When dump debugging, we don't expect to have a lock,

src/coreclr/vm/frames.h

@@ -1041,8 +1041,10 @@ typedef DPTR(class SoftwareExceptionFrame) PTR_SoftwareExceptionFrame;
 class SoftwareExceptionFrame : public Frame
 {
     TADDR                           m_ReturnAddress;
-    T_CONTEXT                       m_Context;
     T_KNONVOLATILE_CONTEXT_POINTERS m_ContextPointers;
+    // This T_CONTEXT field needs to be the last field in the class because it is a
+    // different size between Linux (pal.h) and the Windows cross-DAC (winnt.h).
+    T_CONTEXT                       m_Context;
 
 public:
 #ifndef DACCESS_COMPILE