[MERGE #4858 @pleath] [MSFT 16505301] Remove invalid assert
[MERGE #4858 @pleath] [MSFT 16505301] Remove invalid assert

Merge pull request #4858 from pleath:16505301

A StFld may (now) cause a transition from DeferredTypeHandler to PathTypeHandler. Avoid caching in this case but don't assert.

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