Ensure that the S.N.Vector methods are marked as [Intrinsic] and that the attribute is respected by the runtime (dotnet/coreclr#21601)
* Updating the SIMD intrinsics to check for the `[Intrinsic]` attribute
* Ensure that the existing Vector/Vector<T> intrinsic methods are marked as such.
* Fixing Vector<T>.DotProduct and Vector.AndNot to be treated as intrinsic
* Fixing `SIMDIntrinsicBitwiseAndNot` to swap the operands for XARCH
Commit migrated from https://github.com/dotnet/coreclr/commit/
61c8abe982bc1936112ea843524b0921e373f40f