Use inline type hints in `http/federation/`, `storage/` and `util/` (#10381)

changelog.d/10381.misc

synapse/http/federation/well_known_resolver.py

synapse/storage/background_updates.py

synapse/storage/database.py

synapse/storage/databases/main/appservice.py

synapse/storage/databases/main/end_to_end_keys.py

synapse/storage/databases/main/event_federation.py

synapse/storage/databases/main/event_push_actions.py

synapse/storage/databases/main/events.py

synapse/storage/databases/main/events_bg_updates.py

synapse/storage/databases/main/events_worker.py

synapse/storage/databases/main/purge_events.py

synapse/storage/databases/main/push_rule.py

synapse/storage/databases/main/registration.py

synapse/storage/databases/main/stream.py

synapse/storage/databases/main/tags.py

synapse/storage/databases/main/ui_auth.py

synapse/storage/persist_events.py

synapse/storage/prepare_database.py

synapse/storage/state.py