Add an includecode section in get_campaigns.py so it can be used in the "Getting Started" guide.

To align with the [code example change](googleads/google-ads-java#742) requested for the Java client library.

As seen in this [blog announcement](https://ads-developers.googleblog.com/2023/09/google-ads-shopping-campaign-enhanced.html), any Shopping campaigns using Enhanced cost-per-click (eCPC) will behave as if they are using Manual cost-per-click (CPC) bidding.

Because of the change, I'm updating the examples related to the announcement to reflect the new recommended practice.

Should be using country_code and postal_code (see ref: https://developers.google.com/google-ads/api/reference/rpc/v15/OfflineUserAddressInfo). Sorry I missed this on my last PR.

…d points have been fixed.

…tomizer

Change-Id: Ide8079c878fb3f5a5d5d7220e0e00a35d987d4f3

* Add ability to run unit tests in a Docker container
* Remove support for Python 3.7
* Add support for Python 3.12
* Remove support for Google Ads API v13
* Move to implicit namespace, remove usage of pkg_resources

…#847)

Add new recommendation devsite tags

…ignal (#883)

Migrate setup.py file to a pyproject.toml file
Add support for Python 3.13 and remove support for 3.8
Fix bug in upload_offline_conversion example.
Update library to support default gapic templates.
Regen v17, v18, and v19 with default templates. Remove v16.

… list expiry (#921)