Add python-filter #1832

Job	Run time
python-filter	1s
lint (mypy)	2m 20s
execution-filter	11s
lint (flake8)	17s
Test API, headers and no-engine mode	2m 31s
test-clean-install-ubuntu	1m 54s
test-ubuntu (engine unidist ${{ matrix.unidist-backend }}, python ${{ matrix.python-version }})	0s
test-clean-install-windows	3m 4s
test-asv-benchmarks	0s
test-${{ matrix.os }} (engine ${{ matrix.engine }}, python ${{ matrix.python-version }}, ${{ matrix.test_task }})	0s
test experimental	8m 47s
test-internals	8m 43s
Test ${{ matrix.execution }} execution, Python ${{ needs.python-filter.outputs.python-version }}"	0s
test-${{ matrix.os }}-sanity (engine ${{ matrix.execution.name }}, python ${{ matrix.python-version }})	0s
test-spreadsheet (engine ${{ matrix.engine }}, python ${{ matrix.python-version }})	0s
merge-coverage-artifacts	4s
upload-coverage	18s
	28m 10s

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