https://developers.google.com/google-ads/api/docs/client-libs/python/library-version-10
- Remove ResourceName utility
- Add ability to specify API version at client level, which overrides setting
  at service or type level.
- GoogleAdsClient.get_type is now an instance, not class, level method
- Add copy_from helper method to GoogleAdsClient.
- Add "enums" attribute to GoogleAdsClient for easier Enum accessing.
- Various updates to all examples