Convert state resolution to async/await (#7942)

changelog.d/7942.misc

synapse/api/auth.py

synapse/events/builder.py

synapse/federation/sender/__init__.py

synapse/handlers/presence.py

synapse/push/bulk_push_rule_evaluator.py

synapse/state/__init__.py

synapse/state/v1.py

synapse/state/v2.py

synapse/storage/data_stores/main/push_rule.py

synapse/storage/data_stores/main/roommember.py

synapse/storage/data_stores/main/user_directory.py

synapse/storage/persist_events.py

tests/federation/test_federation_sender.py

tests/state/test_v2.py

tests/storage/test_room.py

tests/test_state.py

tests/test_utils/__init__.py