TMSS-1912: use orjson which is even faster and supports datetime serialization

Docker/lofar-ci/Dockerfile_ci_scu

SAS/TMSS/backend/src/tmss/settings.py

SAS/TMSS/backend/src/tmss/tmssapp/renderers/CMakeLists.txt

SAS/TMSS/backend/src/tmss/tmssapp/renderers/UJSONRenderer.py

SAS/TMSS/backend/src/tmss/tmssapp/renderers/__init__.py