Move misplaced CE events into EE

Overview

Copied over from notable observations in the Secret Detection metrics, events, and instrumentation audit:

CE events that should be in EE

There are four events:

• spp_scan_executed
• spp_scan_passed
• spp_push_blocked_secrets_found
• spp_push_blocked_secrets_found_with_errors

That were placed in CE because we planned to enable Secret Push Protection for ALL public projects.

That, however, is no longer happening. Those should be moved back to EE with tiers changed to ultimate only.

Implementation Plan

• Move all events back to the EE part of the codebase.
• Update event defintions for each, so that tiers is ultimate only.