Add GA4 tracking to the document list component

[AshGDS]

What

• Adds GA4 tracking to the document list component
• Allows the values in the GA4 JSON to be expanded by passing through a ga4_data object when rendering the component, similar to Expand GA4 share link tracking to allow for extra values #3872
• Note that we have tracking enabled on components by default now, and use disable_ga4 to turn it off if needed. We do this instead of enabling tracking ourselves by passing ga4_tracking: true like we used to.

Why

• Required for our organisation pages tracking
• https://trello.com/c/gAiBgeTx/785-add-tracking-organisation-pages

Visual Changes

Changed the document list examples to reflect the new tracking

[JamesCGDS]

Quick question - would we want to update the With data attributes on links section in the documentation for this component? Currently it says "Note that the component does not include built in tracking. If this is required consider using the track click script"

If ga4 tracking is now enabled by default, would it be worth clarifying that the above is referring to UA?

[JamesCGDS]

Looking good (just got a small change request) 👍

[AshGDS]

Thanks @JamesCGDS - should be ready for another review. I've updated that sentence in the docs as well to mention universal analytics.

[AshGDS]

Thanks @andysellick - should be ready for review again 👍

[andysellick]

@AshGDS the visual diff test is mostly failing because of recently merged changes to the crown logo - if you rebase they should disappear.

[AshGDS]

Thanks @andysellick - should be ready to review again. The visual failures seem to be because I added two new examples to the document list docs

[andysellick]

👏

Superseded by Andy's review