[https://nvbugs/6403909][test] Remove attention backend test waiver

[yuxianq]

Summary by CodeRabbit

• Tests
  • Removed an obsolete test waiver for an attention backend test, allowing it to run as part of the integration test suite.

Description

Remove the H100 waiver for the Qwen2 BF16 context-attention case tracked by NVBug 6403909.

The failure was reproduced on the bug-era build and isolated to the obsolete unconditional SM90 paged-context FMHA override. That override was removed by #15838, and the complete current attention test directory passes on H100, so the test should run normally in CI again.

Test Coverage

• Exact bug-era test repeated 100 times: 100 passed.
• Complete bug-era test_attention_backend matrix repeated 100 times: 93,200 passed.
• Complete current H100 attention directory: 1,381 passed and 2,788 skipped.
• Waiver parser: 474 entries parsed; all markers are SKIP.
• python3 scripts/check_test_list.py --validate: 2,210 unique test entries validated.
• Pre-commit waiver duplicate and AST validation hooks passed.

PR Checklist

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• PR Follows TRT-LLM CODING GUIDELINES to the best of your knowledge.

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• Documentation updated as needed

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• Please check this after reviewing the above items as appropriate for this PR.

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[yuxianq]

/bot run --disable-fail-fast

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📥 Commits

Reviewing files that changed from the base of the PR and between 71d8291 and 711effd.

📒 Files selected for processing (1)

• tests/integration/test_lists/waives.txt

💤 Files with no reviewable changes (1)

• tests/integration/test_lists/waives.txt

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📝 Walkthrough

Walkthrough

Removes one integration test waiver for the DGX_H100 attention backend test previously skipped under nvbugs/6403909.

Changes

Test waiver update

Layer / File(s)	Summary
Remove attention backend waiver tests/integration/test_lists/waives.txt	Deletes the waiver entry for the DGX_H100 attention backend test.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• NVIDIA/TensorRT-LLM#15585: Also modifies the integration test waiver list.

Suggested reviewers: schetlur-nv, brnguyen2

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is concise and accurately reflects removing the NVBug 6403909 attention-backend waiver.
Description check	✅ Passed	The description includes the required Description, Test Coverage, and PR Checklist sections and clearly explains the change and validation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[tensorrt-cicd]

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PR_Github #59349 [ run ] completed with state SUCCESS. Commit: 711effd
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