chore(main): release google-cloud-service_directory 2.2.0 (#34433) #108294

Job	Run time
CI (macos-latest, 4.0, --test)	51s
CI (ubuntu-latest, 3.4, --test)	1m 13s
CI (windows-latest, 4.0, --test)	2m 45s
CI (ubuntu-latest, 4.0, --rubocop-toplevel --rubocop --build --yard)	56s
CI (ubuntu-latest, 3.2, --test)	1m 4s
CI (ubuntu-latest, 3.3, --test)	1m 0s
CI (ubuntu-latest, 4.0, --test)	54s
	8m 43s

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