Add builds for MSVC cccl_c_parallel

[miscco]

We want to test the hostjit CI also on windows

[coderabbitai]

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Updated hostjit CI to cover Windows/MSVC for cccl_c_parallel_v2.

• Expanded ci/matrix.yaml so cccl_c_parallel_v2 now runs with both gcc13 and msvc on ctk: 13.X / gpu: rtx2080, including the PR override matrix.
• Added ci/windows/build_cccl_c_parallel_v2.ps1 to support building that preset on Windows via the shared CI build logic.

Walkthrough

Adds a new Windows build script for cccl-c-parallel-v2 and updates CI matrices so that job runs on CUDA 13.X with gcc13 and msvc for rtx2080.

Changes

Windows CI job wiring

Layer / File(s)	Summary
Build script entry point ci/windows/build_cccl_c_parallel_v2.ps1	Adds optional CUDA arch and CMake options parameters, imports shared build logic, and runs the cccl-c-parallel-v2 preset after adjusting the working directory.
Matrix entries ci/matrix.yaml	Updates the override and pull_request matrices for cccl_c_parallel_v2 on ctk: 13.X and gpu: rtx2080 with gcc13 and msvc in cxx.

Suggested reviewers

• suggestion: bernhardmgruber
• suggestion: jrhemstad

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[coderabbitai]

Actionable comments posted: 2

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ℹ️ Review info

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Run ID: 5cb76448-9116-4e38-bcab-1142fc695938

📥 Commits

Reviewing files that changed from the base of the PR and between 8756dfc and 4870199.

📒 Files selected for processing (2)

• ci/matrix.yaml
• ci/windows/build_cccl_c_parallel_v2.ps1

[coderabbitai]

🩺 Stability & Availability | 🟠 Major | ⚡ Quick win

important: Line 25 should not be merged populated. workflows.override replaces the normal pull_request matrix, so this would permanently narrow PR coverage for unrelated changes and keep branch-protection red until someone clears it. Move this to a draft-only branch state and reset override: to empty before merge. As per coding guidelines, Override matrices block PR merges and must be reset to empty before merging; as per path instructions, for ci/**/* focus on matrix correctness and avoiding unnecessary expensive jobs.

Sources: Coding guidelines, Path instructions

[coderabbitai]

🩺 Stability & Availability | 🟡 Minor | ⚡ Quick win

important: Line 13 only checks the leaf name of the current directory. If this script is launched from any unrelated directory named ci, it skips the repo-local pushd and the subsequent configure/build runs against the wrong tree. Compare against the full $PSScriptRoot/.. path, or unconditionally Push-Location to it before importing/building. As per path instructions, for ci/**/* focus on environment setup and clear failures.

Source: Path instructions

[github-actions]

😬 CI Workflow Results

🟥 Finished in 6h 58m: Pass: 50%/2 | Total: 50m 24s | Max: 29m 48s | Hits: 99%/3207

See results here.