[CoreML EP] Add Int32<->Int64 handling around coreml ep (#8183)
* initial int32-int64 type handling
* initial
* clean and fix UT error
* modify code comments
* address partial pr comments
* minor update
* address pr comments
Co-authored-by: rachguo <rachguo@rachguos-Mac-mini.local>
Co-authored-by: rachguo <rachguo@rachguos-Mini.attlocal.net>