Remove warning status in CI tests

[YuLiu98]

Describe Current Status and Possible Solution

Now the CI tests have three statuses: OK, WARNING, and ERROR.

However, we cannot realize the occurrence of the WARNING status, unless we click the button in the PR page and check the integrated tests in detail, which causes the accumulation of tests with the WARNING status.

So. I suggest removing the WARNING status in order to make sure no warnings are introduced by PRs.

Additional Context

No response

[hongriTianqi]

• Understand the problem or question described by the user.
• Check if the issue is a known problem or has been addressed in the documentation.
• Test the issue or problem on a similar system or environment, if possible.
• Identify the root cause or provide clarification on the user's question.
• Provide a step-by-step guide, including any necessary resources, to resolve the issue or answer the question.
• If the issue is related to documentation, update the documentation to prevent future confusion (optional).
• If the issue is related to code, consider implementing a fix or improvement (optional).
• Review and incorporate any relevant feedback from users or developers.
• Ensure the user's issue is resolved or their question is answered and close the ticket.