build: make OwlBot check required (#1354) (#651)
build: make OwlBot check required (#1354) (#651)

Source-Link: https://github.com/googleapis/synthtool/commit/3b0a0e2e84420223d3399ee2c987e20005d13cc3
Post-Processor: 48d5800083e04fbe06b7d85b0e411aebd73b5710@sha256:f40929ecc45d13aac45560a8734e62e50701ca365128c8152d26b6e6eb287421
googleapis/google-cloud-java,googleapis/google-cloud-java,googleapis/google-cloud-java