Replace <cuda/stream_ref> includes with <cuda/stream>

[robertmaynard]

While #2513 fixed all issues in rmm, we had another inflight PR (#2511) that used the old include.

Found by downstream failures in rapids-cmake ( rapidsai/rapids-cmake#1079 )

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

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Plan: Enterprise

Run ID: 5740ae71-6670-40b3-9013-a217f7a3743f

📥 Commits

Reviewing files that changed from the base of the PR and between 4d9a8b7 and 1168a4b.

📒 Files selected for processing (1)

• cpp/include/rmm/detail/cuda_stream.hpp

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📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes
  • Updated CUDA stream integration to improve compatibility and build reliability.

Walkthrough

The CUDA stream detail header now includes <cuda/stream> instead of <cuda/stream_ref>.

Changes

CUDA stream header

Layer / File(s)	Summary
Update CUDA stream include cpp/include/rmm/detail/cuda_stream.hpp	Replaces the <cuda/stream_ref> include with <cuda/stream>.

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

Merge Risk: ⚪ Minimal · up to 1168a

This is a localized include replacement with no actionable merge-blocking risk remaining after normal checks and review.

Possibly related PRs

• rapidsai/rmm#2372: Updates CUDA stream header usage for cuda::stream_ref.
• rapidsai/rmm#2511: Modifies the same header for CUDA stream handling.
• rapidsai/rmm#2513: Continues the include replacement in cuda_stream.hpp.

Suggested labels: non-breaking, improvement

Suggested reviewers: miscco, vyasr, ttnghia

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: replacing outdated CUDA stream header includes.
Description check	✅ Passed	The description explains the remaining outdated include and its downstream impact in rapids-cmake.
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 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests

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