Improve wasm calli thunk lookup (#120199)

* Improve wasm calli thunk lookup

Put the thunks into hash table, this will also serve later for the generated thunk lookups

Add CallFunc_F64_RetF64

* Fix after merge

* Fix return values

* Apply suggestions from code review

Co-authored-by: Aaron Robinson <[email protected]>

* Feedback

Plus removed final from the StringWasmThunkSHashTraits as
NoRemoveSHashTraits needs to derive from it

* Apply suggestion from @jkotas

* Apply suggestion from @jkotas

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Co-authored-by: Aaron Robinson <[email protected]>
Co-authored-by: Jan Kotas <[email protected]>

Author: 3 people