IMA detected on 25b324d (#3058) Support lse in trtllm paged attn kernels

[aleozlx]

This was already reverted due to IMA being detected in CI on all B200 GB200 B300 GB300 systems at this commit 25b324d.

pytest tests/attention/test_trtllm_gen_attention.py -x

But the PR is otherwise prioritized.
Filing this for tracking and auto-triaging attempt.
Go to this PR and repro and analyze the IMA.