Port SIMDIntrinsicGetItem and SIMDIntrinsicSetItem to be implemented via HWIntrinsics (#52288)
* Port SIMDIntrinsicGetItem and SIMDIntrinsicSetItem to be implemented using SimdAsHWIntrinsic
* Apply suggestions from code review
Co-authored-by: Egor Chesakov <Egor.Chesakov@microsoft.com>
* Resolving mismerge
* Added a comment explaining why we sometimes return and sometimes do containment checks
* Update src/coreclr/jit/lsraarm64.cpp
Co-authored-by: Egor Chesakov <Egor.Chesakov@microsoft.com>
Co-authored-by: Egor Chesakov <Egor.Chesakov@microsoft.com>