No AI

No AI removes the AI from the targeted entity, leaving it in a statue-like state.

Using the no-ai tag

Any non-player entity that has the entity-data tag, will be able to use the no-ai tag.

To summon an entity with the no-ai tag:
/summon villager ~ ~ ~ {Tags:["entity-data","no-ai"]}

Tag	Command
no-ai	data modify entity @t NoAI set value 1b