Villager & Zombie Villager Spawn Eggs are inconsistent

Partner Rank: 1

Summary:
Unable to spawn Old villagers/zombie with a spawn egg from Creative Menu

Impact:
This will impact the following content:

• Movie Studio > Entities: Extras (Actors) & Actors
• (Currently in Release schedule) City Living > Entities: Citizens & Workers
• Castle & Dragons > Entities: Snow Minion & Townfolks
• Space > Entities: Scientist & Gromble (Alien)
  The user can not use the creative menu to spawn these entities, this is the only way to get more Spawn eggs.
  >There is no current solution for us to fix maps behaviour packs currently active on people’s devices.

Repro Steps:

1. Download City Living by Noxcrew
2. Run the command

   /tp 1509 147 1798
   

1. Open the chest NPCs Vehicles
2. Observer Spawn Citizen & Spawn Worker items present in the Chest, this chest is made in 1.10.
   
3. Now go the Creative Inventory Tab and Search for Spawn
4. Observer there are no Spawn Citizen & Spawn Worker items present in the Creative Menu
   
5. Observer there are 2 items called Spawn Villager & Spawn Zombie Villager using the same icons as Spawn Citizen & Spawn Worker.

This same behaviour happens in Castle & Dragons with the following items Spawn Snow Minion & Spawn Townfolks
The chest is located at

/tp 646 70 341

Observed Results:

Unable to use Creative Menu to obtain spawn eggs of the old villagers

Expected Results:

The player should be able to spawn old villagers via spawn eggs obtained via creative, rather than only items from a chest or “middle mouse clicked”.

Screenshots/Videos attached: Yes

Regression Builds:
Tested and working in v1.10.0

Notes
A possible solution is to check if the old behaviour and language is present
The game will then use V1 behaviour files + textures for the V2 Villagers/Zombie Villagers items