Run packages check_podspecs build on Mac arm bot #141493
Description
flutter/packages#5873 updates google_maps_flutter to build against arm simulators. Update check_podspecs to run on Mac_arm64 bots.
### iOS+macOS tasks ###
# TODO(stuartmorgan): Move this to ARM once google_maps_flutter has ARM
# support. `pod lint` makes a synthetic target that doesn't respect the
# pod's arch exclusions, so fails to build.
- name: Mac_x64 check_podspecs@stuartmorgan not sure if you had an open issue for this.