Improve search telemetry

[st3fan]

This was taken from #17637 (review)

At the end of the day this code searches the Google SearchEngine instance only, with the check above. Should we simplify this?

If we want to keep it generic for supporting more search engines in the future then:

• Should we check resultUrls instead of suggestUrl since the latter one is the URL we query search suggestions from and doesn't have to be related to the search engine URL. The result URLs may be closer.
• Should we also search in *.state.search.availableEngines? Otherwise you will not find a search engine if the user decided to hide it.
• In appendSearchAttributionToUrlIfNeeded() we already change the URL to the one with the search attribution, so we already know the context, it seems complicated to then check this here again. 🤔 This would also allow us to directly lookup the search engine (e.g. Google) and not have to search for it here, I assume?

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