Convert simple-* to toucan2 (#29427)

* (db/simple-insert! Model opts) -> (t2/insert! (t2/table-name Model)
opts)

* (db/simple-delete! model opts) => (t2/delete! (t2/table-name) opts)

* (db/simple-insert-many! Model opts) => (t2/insert! (t2/table-name Model) opts)