Extending recording/publishing infra

[rkeely]

Seems I messed up the previous PR a bit. Had to create a new one and carry the context here.

This PR is to fulfill this https://github.com/redis/lettuce/discussions/2809#discussioncomment-9055302 and address comments from https://github.com/redis/lettuce/pull/2819

Extending individual events requires duplicating a lot of the functionality within the individual events and it makes these mutable.

I was looking more for an approach where we extend the recording/publishing infrastructure. In particular:

• Add Event getSource() to RecordableEvent and make RecordableEvent extends Event
• Capture the original event in JfrRecordableEvent and rework NoOpEventRecorder to create an event instance
• Long-lived events would be published to EventBus (e.g. EventRecorder.RecordableEvent event = …; later: eventBus.publish(event).
• Adopt JfrEventRecorder.publish(…) to check whether the given event is EventRecorder.RecordableEvent. If so, then we call record(…) on the event instead of jdk.jfr.Event jfrEvent = createEvent(…);
• Retrofit DefaultEventBus to unwrap EventRecorder.RecordableEvent before emitting the event

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This is more about getting the direction correct. Will supply more testing if the infra change looks good.

• Add publish interface in EventRecorder
• Allow DefaultEventBus to publish event through EventRecorder
• Wrap source Event in RecordableEvent

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[rkeely]

@mp911de posted a new commits to address your last comment. Would you please take a look? Still its only changing the infra, and if it looks good, I am thinking to make another change that actually publish/record those RecordableEvent through EventBus.