Revert New Spawn Eggs Textures

⭐Reverts the new 1.21.5 spawn egg textures to the old texture!

📝Note: New mobs with the 1.21.5 spawn egg textures won't be reverted to the old texture. This will be on Bedrock once I have a chance.

if you have feedback let me know: https://forms.gle/S3GVyganFXrFEUeW6