Event listener overhead reduction pt. 3 (#52455)

Event listener overhead reduction pt. 3 (#52455)

* Remove unused field

* Reduce common-case EventWrittenEventArgs overheads

Store PayloadNames on EventMetadata instead of EventWrittenEventArgs

* Avoid duplication around TraceLoggingEventTypes

* Move GetParameterNames into property getter

* While => For

* Add EventMetadata.ParameterTypes

* Defer fetching ParameterTypes

* Add RequiresUnreferencedCode attribute to TraceLoggingEventTypes getter

* Revert init => get

* ActivityId => RelatedActivityId

* Remove eventId arg from DispatchToAllListeners

* Store the first caller's ActivityId in EventWrittenEventArgs

* Move ActivityId from MoreInfo to base object