fix(gcb): Bind artifacts produced from GCB stage

Because we didn't include the BindProducedArtifacts task in the
GCB stage, produced artifacts were not matched to expected artifacts,
which prevented correctly using them downstream.

orca-igor/src/main/groovy/com/netflix/spinnaker/orca/igor/pipeline/GoogleCloudBuildStage.java

@@ -22,6 +22,7 @@
 import com.netflix.spinnaker.orca.pipeline.StageDefinitionBuilder;
 import com.netflix.spinnaker.orca.pipeline.TaskNode;
 import com.netflix.spinnaker.orca.pipeline.model.Stage;
+import com.netflix.spinnaker.orca.pipeline.tasks.artifacts.BindProducedArtifactsTask;
 import javax.annotation.Nonnull;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -38,6 +39,7 @@ public void taskGraph(@Nonnull Stage stage, @Nonnull TaskNode.Builder builder) {
     builder
         .withTask("startGoogleCloudBuildTask", StartGoogleCloudBuildTask.class)
         .withTask("monitorGoogleCloudBuildTask", MonitorGoogleCloudBuildTask.class)
-        .withTask("getGoogleCloudBuildArtifactsTask", GetGoogleCloudBuildArtifactsTask.class);
+        .withTask("getGoogleCloudBuildArtifactsTask", GetGoogleCloudBuildArtifactsTask.class)
+        .withTask("bindProducedArtifacts", BindProducedArtifactsTask.class);
   }
 }