Deduplicate merged GPU quantile sketch entries (#12147) #17511

Job	Run time
Build macOS wheel (macosx_x86_64)	10m 59s
Build CPU wheel (xgboost-cpu) for manylinux_2_28_x86_64	2m 27s
Configure variables for CI	10s
Build CPU wheel (xgboost-cpu) for manylinux_2_28_aarch64	2m 52s
Build macOS wheel (macosx_arm64)	3m 10s
Build GPU-enabled R package	7m 51s
Build CUDA 12 (aarch64)	11m 34s
Build CPU (sanitizer)	16m 51s
Build CUDA 13 (aarch64)	7m 35s
Build CPU (default)	3m 22s
Build CUDA 13 (x86_64)	7m 8s
Build CUDA 12 (x86_64)	10m 56s
Build CUDA with RMM	10m 25s
Google Test (C++) CUDA 12 (mgpu, linux-amd64-mgpu)	3m 21s
Audit CUDA 12 wheel for manylinux_2_28_aarch64	1m 41s
Google Test (C++) CUDA 12 (gpu, linux-amd64-gpu)	5m 46s
Google Test (C++) CUDA 12 (gpu-rmm, linux-amd64-gpu)	5m 41s
Audit CUDA 13 wheel for manylinux_2_28_aarch64	1m 29s
Audit CUDA 12 wheel for manylinux_2_28_x86_64	1m 11s
Google Test (C++) CUDA 13 (gpu, linux-amd64-gpu)	4m 49s
Google Test (C++) CUDA 12 (gpu, linux-arm64-gpu)	5m 10s
Google Test (C++) CUDA 13 (gpu, linux-arm64-gpu)	4m 11s
Audit CUDA 13 wheel for manylinux_2_28_x86_64	54s
Python tests CPU (CPU-arm64)	1m 42s
Python tests CPU (CPU-amd64)	13m 9s
Python tests CUDA 12 (GPU-arm64-CUDA-12)	20m 42s
Python tests CUDA 12 (GPU-x86_64-CUDA-12)	17m 45s
Python tests CUDA 12 (Multi-GPU-x86_64-CUDA-12)	17m 10s
Python tests CUDA 13 (GPU-arm64-CUDA-13)	22m 29s
Python tests CUDA 13 (GPU-x86_64-CUDA-13)	19m 13s
Cross-platform inference test (macOS Apple Silicon) (macos-15-intel, macosx_x86_64)	4m 36s
Cross-platform inference test (macOS Apple Silicon) (macos-14, macosx_arm64)	1m 26s
	4h 7m 45s

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