Fix #14187

[pfgithub]

What does this PR do?

Fixes #14187

• Replace bun's on implementation with node's implementation

• Add node's tests for once and on

• Add listenerCount() support for EventTargets. Node does not support this.

• Replaces eventTargetAgnosticAddListener and eventTargetAgnosticRemoveListener with node's implementation that throws the right errors.

• Update validators.ts's implementation of validateObject to throw on null, like node's does when no options parameter is provided.

• Removes fixed queue test because it tests nothing.

• Documentation or TypeScript types (it's okay to leave the rest blank in this case)

• Code changes

How did you verify your code works?

• I included a test for the new code, or existing tests cover it
• I ran my tests locally and they pass (bun-debug test test-file-name.test)

[robobun]

❌ @pfgithub, your commit 8437baf has some failures in #5388