Disable integration tests, v3 test suite, and mypy for v4 development #1034

Job	Run time
py3.12 \| macos \| unit tests	2m 18s
py3.11 \| ubuntu \| unit tests	2m 13s
py3.12 \| ubuntu \| unit tests	2m 15s
py${{ matrix.python-version }} \| ${{ matrix.os }} \| integration tests	-1s
mypy	-1s
merge-test-artifacts	1s
	6m 45s

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