apache-airflow-providers-google locks google-ads to an unsupported version

[Overbryd]

The apache-airflow-providers-google package locks the google-ads package to an unsupported version.

The maximum supported Google Ads API with the Apache Airflow google provider package is now stuck at v5.
The current supported version (until Jun 2022) is v8.

Hence the Apache Airflow package breaks all Google Ads functionality (API calls with the package Google Ads client are all rejected).

As a user of Airflow, I would expect to be able to upgrade google-ads individually.

[potiuk]

Duplicate of #17111. @Overbryd closing this one as duplicate - if you would like you can provide a PR to fix that one or you can agree with @rv-irosario to join the forces and submit/test the PR. Happy to guide you to with the process.