Update: Integrate the new AnalyticsManager into existing logic
- Guarded by `analytics.usev2` (default off for now)
- Bugfix for rate-limiting being disabled due to mixing Now and UtcNow (whoops)
- Added global `analytics.dryrun` and `analytics.log`
Did a cursory test in editor using dry running and it seems to be working, but it leaks performance data into player_tick blobs. Need to reorganize accumulators again - always-aggregate isn't always valid.
Tests: used above switches and monitored data flow.