[MC-135898] Teams are not retained when a mob converts to another mob

Teams are not retained when a mob converts to another mob. This affects:

Husk → Zombie
Zombie → Drowned
Villager → Zombie Villager
Piglin → Zombified Piglin
Hoglin → Zoglin
Pig → Zombified Piglin
Villager → Witch
Zombie Villager → Villager

How to reproduce

(for a zombie)

Create a team.
```
/team add test "Test Team"
```

Summon a zombie with this command:

/summon minecraft:zombie ~ ~ ~ {Team:"test",Tags:["bug_zombie"]}

Check the number of team members of the team using this command:
```
/team list test
```

You should only see one member on the team.

Next convert the zombie to a drowned using this command:

/data merge entity @e[tag=bug_zombie,limit=1,sort=nearest] {DrownedConversionTime:3}

Check the number of members of the team again:
```
/team list test
```

You should see that there are no members on the team.

I think this is happening because whenever a zombie is converted, the conversion result gets spawned and the zombie is removed without moving the team of the zombie to the result.