Fix extra stack frame on exception stack trace (#99263)

A recently added diagnostic test has revealed that throwing an exception
from a funclet results in an extra frame on the stack trace that should
not be there.
This change fixes it in a manner equivalent to how the old EH handles that.

src/coreclr/nativeaot/Runtime.Base/src/System/Runtime/ExceptionHandling.cs

@@ -771,7 +771,13 @@ private static void DispatchEx(scoped ref StackFrameIterator frameIter, ref ExIn
 
                 DebugScanCallFrame(exInfo._passNumber, frameIter.ControlPC, frameIter.SP);
 
-                UpdateStackTrace(exceptionObj, exInfo._frameIter.FramePointer, (IntPtr)frameIter.OriginalControlPC, frameIter.SP, ref isFirstRethrowFrame, ref prevFramePtr, ref isFirstFrame, ref exInfo);
+#if !NATIVEAOT
+                // Don't add frames at collided unwind
+                if (startIdx == MaxTryRegionIdx)
+#endif
+                {
+                    UpdateStackTrace(exceptionObj, exInfo._frameIter.FramePointer, (IntPtr)frameIter.OriginalControlPC, frameIter.SP, ref isFirstRethrowFrame, ref prevFramePtr, ref isFirstFrame, ref exInfo);
+                }
 
                 byte* pHandler;
                 if (FindFirstPassHandler(exceptionObj, startIdx, ref frameIter,