Remove docs references to Gitlab::InternalEvents.track_event directly
What does this MR do and why?
Ensure all docs references are to using the Gitlab::InternalEventsTracking
module. Follow up from !150994 (comment 1894287608).
MR acceptance checklist
Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.