Revert "Remove event-specific hooks in Analytics class"

[zachmargolis]

This reverts commit 1af92c5 (#7685)

changelog: Internal, Reporting, Revert analytics event refactor

After some digging

• the data.login.gov proofing funnel discrepancies started with the the deploy of the reverted code (slack thread)
• the code changes how the Phone Submit step event was logged to doc_auth_logs, which was the first 3 subsequent events that started to have off numbers

Next steps:

• take a look at the doc auth logs reports after this is deployed
• if no change: revert it back (because the refactor gets the codebase to a better spot, and it didn't affect reporting)
• if there is a change: try to understand why the refactor wasn't successful