[hipthreads] Add hipThreads lit and example-app test jobs to TheRock CI

[marsavicc]

Motivation

JIRA ID : ROCM-23943

Run hipThreads' lit unit tests and example apps in TheRock CI on Linux and Windows. Depends on the hipThreads build PR #6769 .

Technical Details

• Add test_hipthreads.py (runs the lit suite) and test_hipthreads_examples.py (builds + runs saxpy, InOneWeekend, and spmm against the packaged artifact via find_package).
• Register the hipthreads and hipthreads_examples jobs in fetch_test_configurations.py (linux + windows) and add the --hipthreads fetch flag to install_rocm_from_artifacts.py.
• Set HIPTHREADS_VCORES_PER_WGP=1 at test runtime so the scheduler doesn't over-subscribe shared CI GPUs (runtime setting; the shipped library keeps its default).

Test Plan

Run both scripts against a built artifact with OUTPUT_ARTIFACTS_DIR / THEROCK_BIN_DIR set, on Linux and Windows.

Test Result

lit suite and all three example apps pass on Linux and Windows.

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/TheRock/blob/main/CONTRIBUTING.md.

[therock-pr-bot]

❌ PR Check — Action Required

Check	Status	Details
🌿 Branch Name	✅ Pass	—
📝 PR Title/Description	✅ Pass	—
⛔ Forbidden Files	✅ Pass	—
🧪 Unit Test	✅ Pass	—
🔎 pre-commit	❌ Fail	Error: Check concluded with failure.
🚫 Draft PR	🔜 To Be Enabled	—
🚩 Feature Flag	🔜 To Be Enabled	—
📊 Code Coverage	🔜 To Be Enabled	—

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• ❌ pre-commit

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[therock-pr-bot]

Pre-commit check failed

⛔ pre-commit failed

Please run locally:

• python -m pip install pre-commit
• pre-commit install
• pre-commit run --all-files --show-diff-on-failure

This repo uses .pre-commit-config.yaml.

[marbre]

Leaving the second round of review (after @ammallya reviewed and approved) as well as the final approval to @geomin12 who is more into testing.