[jvm-packages] Fix up build for xgboost4j-gpu, xgboost4j-spark-gpu (#6216)

* [CI] Clean up build for JVM packages

* Use correct path for saving native lib

* Fix groupId of maven-surefire-plugin

* Fix stashing of xgboost4j_jar_gpu

* [CI] Don't run xgboost4j-tester with GPU, since it doesn't use gpu_hist

tests/ci_build/build_jvm_packages.sh

@@ -10,7 +10,7 @@ gpu_arch=$3
 gpu_options=""
 if [ "x$use_cuda" == "x-Duse.cuda=ON" ]; then
   # Since building jvm for CPU will do unit tests, choose gpu-with-gpu-tests profile to build
-  gpu_options=" -Pgpu-with-gpu-tests "
+  gpu_options="$use_cuda -Pgpu-with-gpu-tests "
 fi
 
 # Initialize local Maven repository