[pyspark] Fix xgboost spark estimator dataset repartition issues (#8231)
[pyspark] Fix xgboost spark estimator dataset repartition issues (#8231)


dmlc/xgboost,dmlc/xgboost,dmlc/xgboost,dmlc/xgboost,dmlc/xgboost,dmlc/xgboost