fix: hunter doesn't work with MSVC 2026

[shaosu-nvidia]

Summary by CodeRabbit

• Chores
  • Updated build system dependencies to improve compatibility with newer Visual Studio toolsets on Windows CI environments.

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📝 Walkthrough

Walkthrough

This PR updates the HunterGate CMake dependency configuration in a single file. The change replaces a commit-pinned tarball with the v0.26.9 release tarball and corresponding SHA1 hash. Two inline comments are added: one describing the MSVC_VERSION-to-Visual Studio version mapping logic, and another explaining why the version bump was necessary to avoid "Unexpected MSVC_VERSION" errors when the Windows CI runner uses the VS 2026 toolset. The underlying download logic and subsequent CMake includes remain unchanged.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
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.
Title check	✅ Passed	The title accurately describes the main change: updating HunterGate to v0.26.9 to fix compatibility with MSVC 2026, which directly addresses the primary objective of the PR.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ssx/fix_hunter_version

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[aristarkhovNV]

might as well unpun the windows runner image since it apparently does not pin the VS version properly

[shaosu-nvidia]

Seems it's still failing. Maybe the hunter is not compatible at all with the VS 2026