CloudMonitoring: Update sdks to latest (#65252)

* Upgrade grafana-google-sdk-go to v0.1.0

* Upgrade @grafana/google-sdk to 0.1.1

* Update doc with provisioning example

* Remove unused types

* Use config types from the sdk

* Add metrics

docs/sources/datasources/google-cloud-monitoring/_index.md

@@ -108,6 +108,23 @@ datasources:
         -----END PRIVATE KEY-----
 ```
 
+**Using the JWT (Service Account private key path) authentication type:**
+
+```yaml
+apiVersion: 1
+
+datasources:
+  - name: Google Cloud Monitoring
+    type: stackdriver
+    access: proxy
+    jsonData:
+      tokenUri: https://oauth2.googleapis.com/token
+      clientEmail: stackdriver@myproject.iam.gserviceaccount.com
+      authenticationType: jwt
+      defaultProject: my-project-name
+      privateKeyPath: /etc/secrets/gce.pem
+```
+
 **Using GCE Default Service Account authentication:**
 
 ```yaml