feat(external-api) Expose deployment info through API

- Set region along shard from xmpp

modules/API/external/external_api.js

@@ -956,6 +956,17 @@ export default class JitsiMeetExternalAPI extends EventEmitter {
         return avatarURL;
     }
 
+    /**
+     * Gets the deployment info.
+     *
+     * @returns {Promise} - Resolves with the deployment info object.
+     */
+    getDeploymentInfo() {
+        return this._transport.sendRequest({
+            name: 'deployment-info'
+        });
+    }
+
     /**
      * Returns the display name of a participant.
      *