Port SIMDIntrinsicGetItem and SIMDIntrinsicSetItem to be implemented via HWIntrinsics...

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>