Initial support for polars. #11524

Job	Run time
Build libxgboost4j.so with CUDA	6m 15s
Build libxgboost4j.dylib for MacOS (Apple Silicon)	1m 29s
Build libxgboost4j.so targeting glibc 2.17 (arch aarch64, runner linux-arm64-cpu)	1m 45s
Build and test JVM packages (Linux, Scala 2.12)	10m 9s
Build libxgboost4j.dylib for MacOS (Intel)	3m 2s
Build and test JVM packages (windows-latest)	7m 47s
Build libxgboost4j.so targeting glibc 2.17 (arch x86_64, runner linux-amd64-cpu)	1m 50s
Build and test JVM packages (Linux, Scala 2.13)	5m 9s
Build and test JVM packages (macos-13)	11m 31s
Build docs for JVM packages	4m 35s
Test JVM packages with CUDA (Scala 2.12)	6m 11s
Test JVM packages with CUDA (Scala 2.13)	6m 6s
Deploy JVM packages to S3 (cpu)	9s
Deploy JVM packages to S3 (cpu)	6s
Deploy JVM packages to S3 (gpu)	9s
Deploy JVM packages to S3 (gpu)	9s
	1h 6m 22s

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