fix: set x-goog-request-params for streaming pull request (#1849)

* samples: create BigQuery subscription

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* fix: set x-goog-request-params for streaming pull request

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Megan Potter <57276408+feywind@users.noreply.github.com>

src/message-stream.ts

@@ -323,8 +323,13 @@ export class MessageStream extends PassThrough {
         ? 0
         : this._subscriber.maxBytes,
     };
+    const otherArgs = {
+      headers: {
+        'x-goog-request-params': 'subscription=' + this._subscriber.name,
+      },
+    };
 
-    const stream: PullStream = client.streamingPull({deadline});
+    const stream: PullStream = client.streamingPull({deadline, otherArgs});
     this._replaceStream(index, stream);
     stream.write(request);
   }