Optimization of PushRowPage for high number of cpu cores #14098

Job	Run time
Build CPU	9m 6s
Build CUDA + manylinux_2_28_x86_64 wheel	6m 17s
Build CPU ARM64 + manylinux_2_28_aarch64 wheel	3m 2s
Build CUDA with RMM (dev)	6m 15s
Build CUDA with RMM	6m 2s
Build GPU-enabled R package	8m 8s
Build manylinux2014_aarch64 wheel	2m 57s
Build manylinux2014_x86_64 wheel	3m 35s
Run Google Tests with GPUs (Suite gpu, Runner linux-amd64-gpu)	4m 14s
Run Python tests (single-gpu)	5m 55s
Run Google Tests with GPUs (Suite gpu-rmm, Runner linux-amd64-gpu)	4m 12s
Run Python tests (multiple-gpu)	5m 50s
Run Google Tests with GPUs (Suite mgpu, Runner linux-amd64-mgpu)	2m 20s
Run Python tests (cpu-amd64)	5m 53s
Run Python tests (cpu-arm64)	1m 9s
	1h 14m 55s

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