[ci] fix: fix async ulysses test

[Crystal-jiang]

What does this PR do?

fix async ulysses test bug

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[gemini-code-assist]

Code Review

This pull request correctly fixes a bug in the async ulysses tests where the is_torch_npu_available function was not being called, causing the tests to be skipped incorrectly. The change is simple and effective. I have also provided a suggestion to improve the maintainability of the test code by refactoring duplicated decorators.

[gemini-code-assist]

While this line is now correct, the combination of skipif decorators on lines 65-66 is duplicated for test_self_attn_padding (lines 117-118). This duplication can make maintenance more difficult and error-prone. If the skip conditions need to be updated, the change must be applied in multiple places, increasing the risk of inconsistency and potentially leading to tests being skipped or run incorrectly in the future.

To improve maintainability and readability, consider combining these conditions into a single decorator. For example:

@pytest.mark.skipif(
    get_torch_device().device_count() < 4 or is_torch_npu_available(),
    reason="Requires >=4 devices and is not supported on NPU for async ulysses test"
)

Applying this pattern would make the test suite more robust. Since you are already modifying this part of the code, it would be a good opportunity to address this.