chore: use gapic-generator-python 0.53.4#435

Merged

gcf-merge-on-green[bot] merged 4 commits intomainfrom

owl-bot-28a06ef1-8b32-456c-a68c-0d176b00ae70

Nov 1, 2021

Commits on Oct 30, 2021

Commits on Oct 31, 2021

fix(deps): drop packaging dependency
parthea
committed