Wardens forget their targets on world reload

When the world is reloaded, any entities being targeted by a warden will no longer be targeted.

This is very easily exploitable by players in single-player worlds, making the warden a minimal threat.

Reproduction Steps:

1. Load a new world
2. Summon a warden via spawn egg, sculk shrieker, /summon, etc.
3. Anger the warden until it chases the player
4. Close the world
5. Open the world and observe the warden's behavior

Expected Result:

The warden would continue chasing and attacking the player

Observed Result:

The warden forgets the player and resumes idle behavior

Attachments:

• Video observing the behavior (warden_forgets_target.mp4)