Revert "Allow monitor script to be run without requiring snowplow-micro"

What does this MR do and why?

Revert "Merge branch '461635-monitor-without-snowplow' into 'master'"

This reverts merge request !155848 (merged) to resolve a master:broken incident: gitlab-org/quality/engineering-productivity/master-broken-incidents#7001 (closed).

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.

How to set up and validate locally

bundle exec rspec spec/scripts/internal_events/cli_spec.rb:665