Entity scores are wiped when going through a portal

Summary:
Sending an non-player entity across dimensions wipes their scores on the scoreboard.

Verification Build:
1.21.2

Regression Builds:
N/A

Impact:
This is pretty important to be able to link entities to players between dimensions

Repro Steps:
1. Create portal
2. Spawn wolf
3. Create scoreboard objective
4. Put scoreboard on display
5. Give wolf score
6. Push wolf through portal
7. Enter portal and watch sidebar

Observed Results:
The score is wiped

Expected Results:
The score should remain on the entity

Video demo:
https://www.youtube.com/watch?v=y8ILxF171zM