Deduplicate merged GPU quantile sketch entries #17506

Job	Run time
Configure variables for CI	10s
Build CPU wheel (xgboost-cpu) for manylinux_2_28_x86_64	2m 22s
Build macOS wheel (macosx_x86_64)	13m 47s
Build macOS wheel (macosx_arm64)	4m 9s
Build CPU wheel (xgboost-cpu) for manylinux_2_28_aarch64	2m 39s
Build GPU-enabled R package	7m 36s
Build CUDA 13 (aarch64)	11m 36s
Build CPU (sanitizer)	18m 52s
Build CUDA 13 (x86_64)	12m 40s
Build CPU (default)	5m 43s
Build CUDA 12 (aarch64)	12m 52s
Build CUDA with RMM	16m 30s
Build CUDA 12 (x86_64)	14m 10s
Audit CUDA 13 wheel for manylinux_2_28_x86_64	47s
Audit CUDA 12 wheel for manylinux_2_28_x86_64	55s
Audit CUDA 13 wheel for manylinux_2_28_aarch64	1m 19s
Audit CUDA 12 wheel for manylinux_2_28_aarch64	1m 26s
Python tests CPU (CPU-arm64)	1m 30s
Python tests CPU (CPU-amd64)	13m 2s
Python tests CUDA 12 (GPU-arm64-CUDA-12)	20m 2s
Python tests CUDA 12 (GPU-x86_64-CUDA-12)	17m 22s
Python tests CUDA 13 (GPU-arm64-CUDA-13)	20m 56s
Python tests CUDA 12 (Multi-GPU-x86_64-CUDA-12)	16m 56s
Python tests CUDA 13 (GPU-x86_64-CUDA-13)	20m 4s
Google Test (C++) CUDA 13 (gpu, linux-amd64-gpu)	4m 53s
Google Test (C++) CUDA 12 (gpu, linux-arm64-gpu)	4m 46s
Google Test (C++) CUDA 12 (gpu-rmm, linux-amd64-gpu)	5m 44s
Google Test (C++) CUDA 12 (mgpu, linux-amd64-mgpu)	3m 20s
Google Test (C++) CUDA 13 (gpu, linux-arm64-gpu)	3m 28s
Google Test (C++) CUDA 12 (gpu, linux-amd64-gpu)	5m 41s
Cross-platform inference test (macOS Apple Silicon) (macos-15-intel, macosx_x86_64)	4m 27s
Cross-platform inference test (macOS Apple Silicon) (macos-14, macosx_arm64)	1m 33s
	4h 31m 17s

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