Dev/cpu/push row page optimisation #232

Job	Run time
Build libxgboost4j.so with CUDA	1s
Build libxgboost4j.dylib for MacOS (Apple Silicon)	1m 43s
Build libxgboost4j.so targeting glibc 2.17 (arch aarch64, runner linux-arm64-cpu)	1s
Build and test JVM packages (windows-latest)	9m 31s
Build and test JVM packages (Linux, Scala 2.12)	1s
Build libxgboost4j.dylib for MacOS (Intel)	2m 55s
Build libxgboost4j.so targeting glibc 2.17 (arch x86_64, runner linux-amd64-cpu)	1s
Build and test JVM packages (macos-13)	9m 45s
Build and test JVM packages (Linux, Scala 2.13)	1s
Test JVM packages with CUDA (Scala ${{ matrix.scala_version }})	0s
Build docs for JVM packages	0s
Deploy JVM packages to S3 (${{ matrix.variant.name }})	0s
	23m 59s

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