Add missing types to opentracing. (#13345)

changelog.d/13328.misc

changelog.d/13345.misc

mypy.ini

synapse/federation/transport/server/_base.py

synapse/handlers/device.py

synapse/handlers/e2e_keys.py

synapse/handlers/e2e_room_keys.py

synapse/logging/opentracing.py

synapse/metrics/background_process_metrics.py

synapse/rest/client/keys.py

synapse/storage/databases/main/deviceinbox.py

synapse/storage/databases/main/devices.py

synapse/storage/databases/main/end_to_end_keys.py

tests/logging/test_opentracing.py