feat: Add clickedHeader event

[xander-pero]

The type of this PR is: feat

Description

I add clickedHeader event which should be called on the artist page when a user clicks on Artworks, Auction Results, or About. Some notes about the implementation:

• artistHeader isn't the most descriptive context_module but it already exists, and didn't want to introduce a new one
• for context_page_owner_type, the experiment group will always fire artist because that's the URL. However, if possible, I'd like the control group to fire artist when they're under Artworks or About, and artistAuctionResults when they're under Auction Results. If this is overly annoying to implement, everything firing artist is alright too; just let me know.
• The current artist page fires a Click event on these headers. We should deprecate that event and replace it with clickedHeader so that both control and experiment are firing the same event.

PR Checklist (tick all before merging)

• If I've added a new file to the tree I've exported it from the common index.ts
• I've added comments with examples for any new interfaces and ensured that they're in the docs
• No platform-specific terminology has been used outside of click and tap (platform is inferred by the DB storing events)

[artsyit]

🚀 PR was released in v4.318.0 🚀