update integration test script

Author: scotthart

ci/cloudbuild/builds/lib/integration.sh

@@ -271,7 +271,7 @@ function integration::bazel_with_emulators() {
     # As we support both WORKSPACE and MODULE modes for bazel, we need to determine
     # the path to these dependencies dynamically.
     read -r protobuf_proto_path < <(find "${bazel_output_base}/external" -name "empty.proto" | sed -nE 's/(.+\/src)\/google\/protobuf\/empty.proto/\1/p')
-    read -r googleapis_proto_path < <(find "${bazel_output_base}/external" -name "api-index-v1.json" | sed -nE 's/(.+)\/api-index-v1.json/\1/p')
+    read -r googleapis_proto_path < <(find "${bazel_output_base}/external" -name "generator-versions.json" | sed -nE 's/(.+)\/generator-versions.json/\1/p')
 
     bazel run --action_env=GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes \
       //generator:google-cloud-cpp-codegen -- \