chore(main): release google-cloud-logging-v2 1.7.0 (#34312) #109201

Job	Run time
CI (ubuntu-latest, 3.3, --test)	1m 25s
CI (windows-latest, 4.0, --test)	3m 50s
CI (ubuntu-latest, 4.0, --test)	1m 12s
CI (macos-latest, 4.0, --test)	1m 9s
CI (ubuntu-latest, 3.4, --test)	1m 44s
CI (ubuntu-latest, 4.0, --rubocop-toplevel --rubocop --build --yard)	1m 27s
CI (ubuntu-latest, 3.2, --test)	1m 23s
	12m 10s

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