feat: Added code to calculate Search Ads 360 net conversions

[leviorca]

The solution pulls conversions from SA360 using Google Search Ads API and uploads a copy to a new floodlight activity with a new revenue calculated deducting internal costs. Profitable_Sales _SA360_GCP_Automation.pdf

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[leviorca]

@googlebot I signed it!

[google-cla[bot]]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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[mik-laj]

Hello. Have you thought about passing these operators to Apache? In the next step, they will be available as a backport package/provider package, and these packages are installed by default in the Cloud Composer environment. This will significantly facilitate and promote their use. If you are interested, I will be happy to help.

[leviorca]

@googlebot I signed it!

[KingsleyKelly]

Thanks for this @leviorca. We will be adding a few comments this week.

@mik-laj thanks for the offer!

[KingsleyKelly]

LGTM to me. I believe the next step will be to refactor this to use more generic Airflow, however I don't think that's a blocker.