Use static GTest

[bdice]

Description

This switches cuOpt to fetch GTest with CPM and statically link it into the test executables. This removes the conda dependency on gtest and aligns with what we do in cuDF and other RAPIDS libraries.

Checklist

• I am familiar with the Contributing Guidelines.
• Testing
  • New or existing tests cover these changes
  • Added tests
  • Created an issue to follow-up
  • NA
• Documentation
  • The documentation is up to date with these changes
  • Added new documentation
  • NA

Summary by CodeRabbit

• Chores
  • Removed gtest/gmock testing framework dependencies from Conda environments, recipes, and shared dependency manifests.
  • Updated GTest integration to build as a static library and removed the external test-version pinning.

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[coderabbitai]

📝 Walkthrough

Walkthrough

Removed gmock and gtest from multiple conda environment and recipe files, removed gtest_version from a conda build config, and changed the GTest CMake hook to call rapids_cpm_gtest() with BUILD_STATIC.

Changes

Cohort / File(s)	Summary
Conda environment configurations conda/environments/all_cuda-129_arch-aarch64.yaml, conda/environments/all_cuda-129_arch-x86_64.yaml, conda/environments/all_cuda-130_arch-aarch64.yaml, conda/environments/all_cuda-130_arch-x86_64.yaml	Removed gmock and gtest from the dependencies lists in all four environment files.
Conda recipe configuration conda/recipes/libcuopt/conda_build_config.yaml	Removed the gtest_version entry from the conda build configuration.
Conda recipe specification conda/recipes/libcuopt/recipe.yaml	Removed gmock and gtest entries from host requirements, outputs, run, and ignore_run_exports sections across recipe outputs.
Build configuration (CMake) cpp/cmake/thirdparty/get_gtest.cmake	Updated call to rapids_cpm_gtest() to pass BUILD_STATIC, changing the GTest build mode to static.
Dependency manifest dependencies.yaml	Removed gmock and gtest from dependencies/test_cpp/common.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

• Check that removing gtest_version doesn't break references in other recipes or CI scripts.
• Verify downstream build/test behavior where gmock/gtest were previously expected (CI, local dev, packaging).
• Confirm the BUILD_STATIC change in get_gtest.cmake yields intended linkage and doesn't affect platforms differently (ARM vs x86_64).

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: switching to static GTest linking and removing conda dependencies on gtest/gmock.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 5351bb2 and c3bc13c.

📒 Files selected for processing (5)

• conda/environments/all_cuda-129_arch-aarch64.yaml
• conda/environments/all_cuda-129_arch-x86_64.yaml
• conda/environments/all_cuda-130_arch-aarch64.yaml
• conda/environments/all_cuda-130_arch-x86_64.yaml
• dependencies.yaml

💤 Files with no reviewable changes (5)

• conda/environments/all_cuda-130_arch-aarch64.yaml
• conda/environments/all_cuda-129_arch-x86_64.yaml
• conda/environments/all_cuda-129_arch-aarch64.yaml
• dependencies.yaml
• conda/environments/all_cuda-130_arch-x86_64.yaml

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (8)

• GitHub Check: wheel-build-cuopt-mps-parser / 13.0.2, 3.12, arm64, rockylinux8
• GitHub Check: wheel-build-cuopt-mps-parser / 13.0.2, 3.13, arm64, rockylinux8
• GitHub Check: wheel-build-cuopt-mps-parser / 13.0.2, 3.12, amd64, rockylinux8
• GitHub Check: wheel-build-cuopt-mps-parser / 13.0.2, 3.11, amd64, rockylinux8
• GitHub Check: wheel-build-cuopt-mps-parser / 13.0.2, 3.11, arm64, rockylinux8
• GitHub Check: wheel-build-cuopt-mps-parser / 13.0.2, 3.10, amd64, rockylinux8
• GitHub Check: wheel-build-cuopt-mps-parser / 13.0.2, 3.10, arm64, rockylinux8
• GitHub Check: wheel-build-cuopt-mps-parser / 13.0.2, 3.13, amd64, rockylinux8

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[github-actions]

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