Remove tracking members from PresentEvent

[planetchili]

Auto-migrated from intel-sandbox/applications.graphics.presentmonservice/issues/400

^{Original creation by JeffersonMontgomery-Intel on 2024-01-26 17:10:22+00:00}

PresentEvent is a mix of metric data and members/structures used while the PresentEvent is being analyzed by the consumer.

We should split this into two structures so we're only copying around the metric data after the analysis is complete.