Values:
LOGGING_UNSPECIFIED (0):
The service determines the logging mode. The default is
LEGACY. Do not rely on the default logging behavior as
it may change in the future.
LEGACY (1):
Build logs are stored in Cloud Logging and
Cloud Storage.
GCS_ONLY (2):
Build logs are stored in Cloud Storage.
STACKDRIVER_ONLY (3):
This option is the same as CLOUD_LOGGING_ONLY.
CLOUD_LOGGING_ONLY (5):
Build logs are stored in Cloud Logging. Selecting this
option will not allow logs
streaming <https://cloud.google.com/sdk/gcloud/reference/builds/log>__.
NONE (4):
Turn off all logging. No build logs will be
captured.