feat: add output_config request field

Committer: @cherba
PiperOrigin-RevId: 397621106

google/cloud/speech/v1/cloud_speech.proto

@@ -91,6 +91,19 @@ message LongRunningRecognizeRequest {
 
   // Required. The audio data to be recognized.
   RecognitionAudio audio = 2 [(google.api.field_behavior) = REQUIRED];
+
+  // Optional. Specifies an optional destination for the recognition results.
+  TranscriptOutputConfig output_config = 4 [(google.api.field_behavior) = OPTIONAL];
+}
+
+// Specifies an optional destination for the recognition results.
+message TranscriptOutputConfig {
+  oneof output_type {
+    // Specifies a Cloud Storage URI for the recognition results. Must be
+    // specified in the format: `gs://bucket_name/object_name`, and the bucket
+    // must already exist.
+    string gcs_uri = 1;
+  }
 }
 
 // The top-level message sent by the client for the `StreamingRecognize` method.