update golden and generator in cloudbuild job

Author: diegomarquezp

.cloudbuild/library_generation/cloudbuild-library-generation-integration-test.yaml

@@ -49,7 +49,7 @@ steps:
     cd /workspace
     git clone https://github.com/googleapis/google-cloud-java
     cd google-cloud-java
-    git switch 113a378d5aad5018876ec0a8cbfd4d6a4f746809
+    git switch f580186103e80bf34ee050e4933e94c2501d62ab
     git checkout chore/test-hermetic-build
     mkdir ../golden
     cd ../golden
@@ -69,7 +69,7 @@ steps:
   - |
     mvn dependency:copy \
       -B -ntp \
-      -Dartifact=com.google.api:gapic-generator-java:2.38.1 \
+      -Dartifact=com.google.api:gapic-generator-java:2.55.1 \
       -DoutputDirectory=/workspace
     cd /workspace
     mv gapic-generator-java-2.38.1.jar gapic-generator-java.jar