Use inline type hints in `handlers/` and `rest/`. (#10382)

changelog.d/10382.misc

synapse/handlers/_base.py

synapse/handlers/admin.py

synapse/handlers/appservice.py

synapse/handlers/auth.py

synapse/handlers/cas.py

synapse/handlers/device.py

synapse/handlers/devicemessage.py

synapse/handlers/directory.py

synapse/handlers/e2e_keys.py

synapse/handlers/events.py

synapse/handlers/federation.py

synapse/handlers/groups_local.py

synapse/handlers/initial_sync.py

synapse/handlers/message.py

synapse/handlers/oidc.py

synapse/handlers/pagination.py

synapse/handlers/presence.py

synapse/handlers/profile.py

synapse/handlers/receipts.py