Convert simple_select_one_txn and simple_select_one to return tuples. (#16612)

changelog.d/16612.misc

synapse/_scripts/synapse_port_db.py

synapse/handlers/room.py

synapse/handlers/room_member.py

synapse/module_api/__init__.py

synapse/rest/admin/rooms.py

synapse/rest/client/directory.py

synapse/storage/database.py

synapse/storage/databases/main/devices.py

synapse/storage/databases/main/e2e_room_keys.py

synapse/storage/databases/main/end_to_end_keys.py

synapse/storage/databases/main/event_federation.py

synapse/storage/databases/main/events.py

synapse/storage/databases/main/events_worker.py

synapse/storage/databases/main/media_repository.py

synapse/storage/databases/main/profile.py

synapse/storage/databases/main/push_rule.py

synapse/storage/databases/main/receipts.py

synapse/storage/databases/main/registration.py

synapse/storage/databases/main/room.py