Add support for sending data for Google Ads Enhanced Conversions

Problem/Motivation

The purchase event sends proper data for GA4 but most webshops will also have Ads remarketing running and enhanced conversions provides a better marketing. It would be good if the module would have an option to turn a feature like this on.

https://support.google.com/google-ads/answer/13258081#Add_a_code_snippet...

https://support.google.com/google-ads/answer/9888656?hl=en

https://support.google.com/google-ads/answer/13262500?utm_source=Custome...

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes