Update to 26.04

[hcho3]

Use RAPIDS 26.04

[hcho3]

@AyodeAwe How do we go about bumping the RAPIDS version used by cuForest? I changed the content of VERSION but it broke the CI apparently.

[coderabbitai]

📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Bumped project version from 26.02.00 to 26.04.00
  • Updated internal dependency versions across conda environments and build configurations to align with 26.04 release
  • Updated CI/CD container image to latest compatible version

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Walkthrough

Version bump across the codebase updating dependencies and CI/CD configurations from 26.02 to 26.04. Changes include the main version file, container image in workflows, conda environment dependencies, and Python package manifests.

Changes

Cohort / File(s)	Summary
CI/CD and Version .github/workflows/pr.yaml, VERSION	Updated container image to 26.04-latest and bumped main version from 26.02.00 to 26.04.00.
Conda Environment Files conda/environments/all_cuda-129_arch-aarch64.yaml, conda/environments/all_cuda-129_arch-x86_64.yaml, conda/environments/all_cuda-131_arch-aarch64.yaml, conda/environments/all_cuda-131_arch-x86_64.yaml, conda/environments/clang_tidy_cuda-129_arch-x86_64.yaml, conda/environments/clang_tidy_cuda-131_arch-x86_64.yaml, conda/environments/cpp_all_cuda-129_arch-x86_64.yaml, conda/environments/cpp_all_cuda-131_arch-x86_64.yaml	Updated RAPIDS package versions (libraft, librmm, pylibraft, rapids-xgboost, libraft-headers) from 26.02.\* to 26.04.\* across all environments.
Dependency Manifest dependencies.yaml	Bumped versions for libcuforest-tests, rapids-xgboost, cuforest, libraft, librmm, pylibraft and their CUDA-variant entries from 26.02.\* to 26.04.\* across test, depends_on, and matrix blocks.
Python Project Dependencies python/cuforest/pyproject.toml, python/libcuforest/pyproject.toml	Updated dependency pins for libcuforest, libraft, librmm, and pylibraft from 26.02.\* to 26.04.\* in both dependencies and build requirements sections.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

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Note

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