feat: Initial generation of google-cloud-ces-v1beta #105235

Job	Run time
CI (ubuntu-latest, 4.0, --test)	58s
CI (windows-latest, 4.0, --test)	2m 49s
CI (macos-latest, 4.0, --test)	1m 4s
CI (ubuntu-latest, 3.1, --test)	47s
CI (ubuntu-latest, 3.4, --test)	1m 11s
CI (ubuntu-latest, 3.3, --test)	1m 8s
CI (ubuntu-latest, 3.2, --test)	1m 6s
CI (ubuntu-latest, 4.0, --rubocop-toplevel --rubocop --build --yard --linkinator)	1m 40s
	10m 43s

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