For array fields, optionally do an array column in Postgres

[TomDo1234]

Currently, Payload does not leverage postgres's array column type for collection array fields.

Instead, it uses join tables and stuff for this sort of thing. The reason I want an option to do literal array columns instead, is that its a performance boost. I have a collection with a lot of fields with quite a lot of array types, it has like 20 join tables no kidding. It will be a great performance increase if we can "trim down the join tables" of this collection