Fix cpu import error

[yuanfz98]

From triton commit 768fc1fcd98ecfc0892f8982b0bb009dd7bb11ea, the functon version_key() is no longer there.

[nhat-nguyen]

Thanks @yuanfz98, would you mind also updating the commit hash in .github/workflows/integration-tests.yml as well? This change should work with the latest triton.

[yuanfz98]

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