[MERGE #5408 @thomasmo] Fix assert for DeepCopy of DynamicObject with TaggedInt
[MERGE #5408 @thomasmo] Fix assert for DeepCopy of DynamicObject with TaggedInt

Merge pull request #5408 from pr/thomasmo/deepcopy_int_assert

From earlier DeepCopy fixes, an assert was added to ensure that deep copied slots were never on the stack. However, TaggedInts can create a false positive, causing the assert to fail. The fix is to account for TaggedInts.

Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore