build: use multiScm for Kokoro release builds#294

Linchin merged 1 commit intomaingoogleapis/python-db-dtypes-pandas:mainfrom

owl-bot-update-lock-5cddfe2fb5019bbf78335bc55f15bc13e18354a56b3ff46e1834f8e540807f05googleapis/python-db-dtypes-pandas:owl-bot-update-lock-5cddfe2fb5019bbf78335bc55f15bc13e18354a56b3ff46e1834f8e540807f05Copy head branch name to clipboard