Update Cython to the latest prior 3.0 version and remove tracing from… #977

Job	Run time
Run tests with coverage	41s
Run tests on legacy versions (3.7)	36s
Run linters (flake8)	1m 53s
Run tests on legacy versions (pypy2.7)	18s
Run linters (pydocstyle)	1m 51s
Run tests (3.8)	1m 27s
Run tests on legacy versions (pypy3.9)	36s
Run linters (mypy)	1m 52s
Run tests (3.9)	1m 18s
Run linters (pylint)	2m 1s
Run tests (3.10)	1m 21s
Run tests (3.11)	1m 17s
Run tests (3.12)	2m 26s
	17m 37s

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