before-delete doesn't work correctly when query manually specifies :delete-from or :delete/:from #203
Description
(t2/delete! :model/Field
{:delete-from [:metabase_field :field]
:where [:= :id 0]})runs a query like
SELECT * DELETE FROM `metabase_field` AS `field` FROM `metabase_field` WHERE `id` = ?which of course doesn't make sense.
We need to make sure before-delete removes :delete-from / :delete before handing off to select but correctly uses any aliases specified there