Be able to filter bulk DELETE and GET queries by a list of row IDs about piccolo_api

[sinisaos]

@dantownsend We can do this similarly to visible_fields. My question is whether we can replace the delete_all method (which is disabled by default with allow_bulk_delete is False) with delete_bulk method or delete_bulk method must be separated, with a separate endpoint? If we can replace delete_all (I already wrote working code) we can set allow_bulk_delete to True because there is no longer a chance for user to delete all records, but only the results whose id is in the query params. For example:

DELETE /api/tables/movies/?__ids=1,2,3,4,5  (only rows with id is in __ids will be deleted)

[sinisaos]

@dantownsend What do you think of this idea?