timeout in GCS+gRPC samples

Step #3: * GCB: https://console.cloud.google.com/cloud-build/builds;region=us-east1/b59f23f8-b798-4c38-a0b1-2eba12bc627e;tab=detail?project=cloud-cpp-testing-resources
Step #3: * Raw: https://storage.googleapis.com/cloud-cpp-community-publiclogs/logs/google-cloud-cpp/main/48ea59af1a7372a2c541fe68d41e7a817893207a/fedora-37-bazel-gcs-grpc/log-b59f23f8-b798-4c38-a0b1-2eba12bc627e.txt

[7,520 / 7,521] 266 / 267 tests; Testing //google/cloud/storage/examples:storage_lifecycle_management_samples; 300s linux-sandbox

TIMEOUT: //google/cloud/storage/examples:storage_lifecycle_management_samples (Summary)
      /h/.cache/bazel/_bazel_root/eab0d61a99b6696edb3d2aff87b585e8/execroot/google_cloud_cpp/bazel-out/k8-fastbuild/testlogs/google/cloud/storage/examples/storage_lifecycle_management_samples/test.log
INFO: From Testing //google/cloud/storage/examples:storage_lifecycle_management_samples:
==================== Test output for //google/cloud/storage/examples:storage_lifecycle_management_samples:

Creating bucket to run the examples
-- Test timed out at 2023-05-05 18:42:15 UTC --
================================================================================
INFO: Elapsed time: 330.289s, Critical Path: 303.83s
INFO: 7521 processes: 3793 remote cache hit, 3431 internal, 297 linux-sandbox.
INFO: Build completed, 1 test FAILED, 7521 total actions
    :
//google/cloud/storage/examples:storage_lifecycle_management_samples    TIMEOUT in 300.0s