[Go] add servicenetworking readme.go.md (#22082)

Author: Alancere

specification/servicenetworking/resource-manager/readme.go.md

@@ -0,0 +1,11 @@
+## Go
+
+These settings apply only when `--go` is specified on the command line.
+
+``` yaml $(go) && $(track2)
+license-header: MICROSOFT_MIT_NO_VERSION
+module-name: sdk/resourcemanager/servicenetworking/armservicenetworking	
+module: github.com/Azure/azure-sdk-for-go/$(module-name)
+output-folder: $(go-sdk-folder)/$(module-name)
+azure-arm: true
+```

specification/servicenetworking/resource-manager/readme.md

@@ -48,8 +48,13 @@ This is not used by Autorest itself.
 ```yaml $(swagger-to-sdk)
 swagger-to-sdk:
   - repo: azure-sdk-for-python-track2
+  - repo: azure-sdk-for-go
 ```
 
 ## Python
 
 See configuration in [readme.python.md](./readme.python.md)
+
+## Go
+
+See configuration in [readme.go.md](./readme.go.md)