[ci] xfail failing tests in CI. #12418
                
     Merged
            
            
          
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What does this PR do?
Example: https://github.com/huggingface/diffusers/actions/runs/18169145894/job/51719269978?pr=12416#step:6:34882
Internal thread is here: https://huggingface.slack.com/archives/C01N44FJDHT/p1759404469135329. Unless that is resolved, let's try to
xfail.