test(rocke): Revert rocke ir parity harness for attention (#9267)

[brockhargreaves-amd]

This reverts commit 1e30ce1.

Motivation

PR #9267 added attention IR cases to the golden byte-stability gate (rocke_representative_ir_sha256.json) and extended the parity harness. The golden was blessed against a specific LLVM flavor/build, but the
hashes do not match on current develop builds — causing test_ir_cases_match_golden_sha256 to fail in CI and locally. This blocks the rocKE pytest suite gate (which runs as part of the hipkernelprovider test artifact) from passing cleanly.

Technical Details

Reverts all three file changes from #9267:

• rocke_representative_ir_sha256.json — removes the 238 new attention
  IR entries that do not match current builds
• rocke_ir_parity_harness.py — removes the attention harness extension
• test_feature_parity.py — restores the removed line

The attention IR parity gate can be re-landed once the golden is blessed against the current LLVM toolchain and verified green in CI.

Test Plan

• Verified test_ir_cases_match_golden_sha256 passes after revert (locally on Windows gfx1151 and in CI on Linux gfx942)

Test Result

Before revert: test_ir_cases_match_golden_sha256 FAILED (IR drift on attention entries).
After revert: all test_rocke_ci_static tests pass.

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

[therock-pr-bot]

✅ All Checks Passed — Ready for Review

Check	Status	Details
🌿 Branch Name	✅ Pass	—
📝 PR Title/Description	✅ Pass	—
⛔ Forbidden Files	✅ Pass	—
🧪 Unit Test	✅ Pass	—
🔎 pre-commit	✅ Pass	—
🚫 Draft PR	🔜 To Be Enabled	—
🚩 Feature Flag	🔜 To Be Enabled	—
📊 Code Coverage	🔜 To Be Enabled	—
🤖 therock-pr-bot	✅ Pass	—

🎉 All checks passed! This PR is ready for review.

📖 Need help? See the Policy FAQ for details on every check and how to fix failures.

[therock-pr-bot]

🎉 All checks passed! This PR is ready for review.