chore(main): release google-cloud-translate-v2 1.2.0 #101335

Job	Run time
CI (ubuntu-latest, 3.1, --test)	1m 1s
CI (ubuntu-latest, 3.4, --test)	1m 19s
CI (ubuntu-latest, 3.2, --test)	1m 7s
CI (windows-latest, 4.0, --test)	2m 41s
CI (macos-latest, 4.0, --test)	55s
CI (ubuntu-latest, 4.0, --rubocop-toplevel --rubocop --build --yard --linkinator)	1m 31s
CI (ubuntu-latest, 3.3, --test)	1m 11s
CI (ubuntu-latest, 4.0, --test)	1m 3s
	10m 48s

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