messaging: integrate msgq runtime logger API

[adeebshihadeh]

Summary

• consume msgq runtime logger API from logger: replace SWAGLOG include hack with runtime logger API msgq#679
• remove the SWAGLOG compile-time include override for msgq_repo in SConstruct
• register msgq C++ logs to cloudlog via common/swaglog.cc using a weak msgq_set_logger hook
• register msgq Python logs in cereal.messaging via msgq.set_logger()
• fix static-link ordering for targets that link both visionipc and msgq symbols

Validation

• scons -j8 msgq_repo/msgq/ipc_pyx.so msgq_repo/msgq/visionipc/visionipc_pyx.so system/loggerd/encoderd tools/replay/replay
• PYTHONPATH=. python - <<'PY' ... import cereal.messaging; VisionIpcServer/VisionIpcClient connect smoke test ... PY
• PYTHONPATH=. pytest -q cereal/messaging/tests/test_pub_sub_master.py