Move reduction properties for local and ptr variable into single dataclass

src/pystencils/backend/kernelcreation/context.py

src/pystencils/backend/kernelcreation/freeze.py

src/pystencils/backend/transformations/add_pragmas.py

src/pystencils/codegen/driver.py

src/pystencils/codegen/parameters.py

src/pystencils/codegen/properties.py

src/pystencils/jit/cpu_extension_module.py

tests/kernelcreation/test_reduction.py