events: extract events file to a separate files

[rluvaton]

The reason I did this is that I want to create another PR to add a fast event emitter for the common cases and the events file is already large enough, if you want I can extract this PR to multiple PRs one for each file

Before merging needs git squash to avoid having commits in main that not working by themself

I extracted the following:

1. EventEmitter to lib/internal/events/event_emitter.js
2. on, once, and getEventListeners to internal/events/event_emitter_helpers.js
3. EventEmitterAsyncResource to lib/internal/events/event_emitter_async_resource.js

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[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/58757/

[avivkeller]

I'm a fan of this idea, but IMO the file names could drop the event_emitter_<...> prefix, but that's only my opinion.

[joyeecheung]

This would penalize startup, make back porting harder, and make git blame and git log less useful. Unless it’s getting completely rewritten I would suggest avoid moving files for moving files’ sake.

[targos]

It's not for moving files' sake if the goal is to open another PR later that uses the extracted internals.

[rluvaton]

I'm working on another PR that creates a fast and slow EventEmitter after talking to @benjamingr and currently the events file is really hard to work with