WorkerConfig defines the configuration to be used for a creating workers
in the pool.
Size of the disk attached to the worker, in GB. See
https://cloud.google.com/compute/docs/disks/ If 0 is
specified, Cloud Build will use a standard disk size.
disk_size is overridden if you specify a different disk
size in build_options. In this case, a VM with a disk size
specified in the build_options will be created on demand
at build time. For more information see
https://cloud.google.com/cloud-
build/docs/api/reference/rest/v1/projects.builds#buildoptions
The tag applied to the worker, and the same tag used by the
firewall rule. It is used to identify the Cloud Build workers
among other VMs. The default value for tag is worker.
