`help` should be added as a reserved word to avoid a breaking change in compute

[parthea]

In PR #1575, help was removed from the reserved names list. Removing it from the list would result in a breaking change for compute. See help_ here which would change to help if we don't have help as a reserved term .

See the breaking change in https://github.com/googleapis/python-compute/pull/417/files