[Port] [2022.3] Fixed two parameters being the wrong type leading to a warning

This is to fix some warnings when using the multiplayer VR template and creating a build. Some shaders generated via shadergraph were doing an implicit truncation of values (specifically the 2 UV sets passed to the UnityMetaVertexPosition function). This has been fixed.

Jira: https://jira.unity3d.com/browse/UUM-84269

Author: lpledouxUnity

Packages/com.unity.render-pipelines.universal/Editor/ShaderGraph/Includes/Varyings.hlsl

@@ -133,7 +133,7 @@ Varyings BuildVaryings(Attributes input)
         output.positionCS.z = max(output.positionCS.z, UNITY_NEAR_CLIP_VALUE);
     #endif
 #elif (SHADERPASS == SHADERPASS_META)
-    output.positionCS = UnityMetaVertexPosition(input.positionOS, input.uv1, input.uv2, unity_LightmapST, unity_DynamicLightmapST);
+    output.positionCS = UnityMetaVertexPosition(input.positionOS, input.uv1.xy, input.uv2.xy, unity_LightmapST, unity_DynamicLightmapST);
 #else
     output.positionCS = TransformWorldToHClip(positionWS);
 #endif