Removed deprecated CreateRenderPipeline path

Renames all the RenderPipeline*2 stuff to simple RenderPipeline* but
keeps *2 definitionas around as typedefs and wrappers so that users can
migrate away from it.

Bug: dawn:22
Change-Id: If301d81a829bba0646c3a61068f2279932b191e0
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/51764
Commit-Queue: Brandon Jones <bajones@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>

src/dawn_wire/server/ServerDevice.cpp

@@ -149,11 +149,10 @@ namespace dawn_wire { namespace server {
         SerializeCommand(cmd);
     }
 
-    bool Server::DoDeviceCreateRenderPipelineAsync(
-        ObjectId deviceId,
-        uint64_t requestSerial,
-        ObjectHandle pipelineObjectHandle,
-        const WGPURenderPipelineDescriptor2* descriptor) {
+    bool Server::DoDeviceCreateRenderPipelineAsync(ObjectId deviceId,
+                                                   uint64_t requestSerial,
+                                                   ObjectHandle pipelineObjectHandle,
+                                                   const WGPURenderPipelineDescriptor* descriptor) {
         auto* device = DeviceObjects().Get(deviceId);
         if (device == nullptr) {
             return false;