Remove Event.wrapper for recent tabs telemetry

[mcarare]

Breakout from #21292.

┆Issue is synchronized with this Jira Task

[sflorean]

Verified as fixed on Nightly 15/4 with OnePlus 9 (Android 12).

{"timestamp":84504,"category": "recently_visited_homepage", "name": "history_highlight_opened"}

{"timestamp":7615,"category": "history", "name": "recent_searches_tapped", "extra":{"page_number": "2"}

{"timestamp":7613,"category": "recently_visited_homepage", "name": "search_group_opened"}