Disable flaky test to stabilize the pipeline

[tishun]

See https://github.com/redis/lettuce/actions/runs/17015188224/job/48236534176
See https://github.com/redis/lettuce/actions/runs/17015188224/job/48236534173
See https://github.com/redis/lettuce/actions/runs/17002751186/job/48207398705

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