Move the various helper intrinsics to be implemented on the S.R.Intri…

…nsics.Vector types (#20147)

* Renaming Vector64.cs, Vector128.cs, and Vector256.cs to be Vector64_1.cs, etc

* Adding some core helper methods to the Vector64, Vector128, and Vecto256 types.

* Adding some documentation comments to the System.Runtime.Intrinsics.Vector types

* Changing `Set` to `With`

src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems

@@ -517,11 +517,14 @@
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\InteropServices\UnmanagedType.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\InteropServices\VarEnum.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\Vector64.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\Vector64DebugView.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\Vector64_1.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\Vector64DebugView_1.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\Vector128.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\Vector128DebugView.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\Vector128_1.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\Vector128DebugView_1.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\Vector256.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\Vector256DebugView.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\Vector256_1.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\Vector256DebugView_1.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Intrinsics\X86\Enums.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Remoting\ObjectHandle.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\Serialization\IDeserializationCallback.cs" />