chore: use sparse checkout and fix paths in zonal tests

Author: chandra-siri

packages/google-cloud-storage/cloudbuild/run_zonal_tests.sh

@@ -4,10 +4,12 @@ echo '--- Installing git and cloning repository on VM ---'
 sudo apt-get update && sudo apt-get install -y git python3-pip python3-venv
 
 # Clone the repository and checkout the specific commit from the build trigger.
-git clone https://github.com/googleapis/python-storage.git
-cd python-storage
+git clone --no-checkout --depth 1 --sparse --filter=blob:none https://github.com/googleapis/google-cloud-python.git
+cd google-cloud-python
+git sparse-checkout set packages/google-cloud-storage
 git fetch origin "refs/pull/${_PR_NUMBER}/head"
 git checkout ${COMMIT_SHA}
+cd packages/google-cloud-storage
 
 
 echo '--- Installing Python and dependencies on VM ---'

packages/google-cloud-storage/cloudbuild/zb-system-tests-cloudbuild.yaml

@@ -63,12 +63,12 @@ steps:
           sleep 15
         done
         # copy the script to the VM
-        gcloud compute scp cloudbuild/run_zonal_tests.sh ${_VM_NAME}:~ --zone=${_ZONE} --internal-ip --ssh-key-file=/workspace/.ssh/google_compute_engine
+        gcloud compute scp packages/google-cloud-storage/cloudbuild/run_zonal_tests.sh ${_VM_NAME}:~ --zone=${_ZONE} --internal-ip --ssh-key-file=/workspace/.ssh/google_compute_engine
 
         # Execute the script on the VM via SSH.
         # Capture the exit code to ensure cleanup happens before the build fails.
         set +e
-        gcloud compute ssh ${_VM_NAME} --zone=${_ZONE} --internal-ip --ssh-key-file=/workspace/.ssh/google_compute_engine --command="ulimit -n {_ULIMIT}; COMMIT_SHA=${COMMIT_SHA} _ZONAL_BUCKET=${_ZONAL_BUCKET} CROSS_REGION_BUCKET=${_CROSS_REGION_BUCKET} _PR_NUMBER=${_PR_NUMBER} bash run_zonal_tests.sh"
+        gcloud compute ssh ${_VM_NAME} --zone=${_ZONE} --internal-ip --ssh-key-file=/workspace/.ssh/google_compute_engine --command="ulimit -n ${_ULIMIT}; COMMIT_SHA=${COMMIT_SHA} _ZONAL_BUCKET=${_ZONAL_BUCKET} CROSS_REGION_BUCKET=${_CROSS_REGION_BUCKET} _PR_NUMBER=${_PR_NUMBER} bash run_zonal_tests.sh"
         EXIT_CODE=$?
         set -e