tests/integration: xfail few unstable tests with cassandra+asyncio #333

Job	Run time
Build source distribution	9s
Build wheels ubuntu-latest (x86_64)	19m 30s
Build wheels ubuntu-latest (PyPy)	1m 7s
Build extra arch aarch64 wheels	1h 57m 0s
Build wheels windows-latest (win64)	22m 22s
Build wheels windows-latest (PyPy)	4m 53s
Build wheels macos-latest (all)	20m 17s
Build wheels macos-13 (all)	32m 26s
Build wheels macos-latest (PyPy)	59s
upload_pypi	0s
	3h 38m 43s

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