[SPARK-41958][CORE] Disallow arbitrary custom classpath with proxy us… #4

Job	Run time
Build modules: core, unsafe, kvstore, avro, network-common, network-shuffle, repl, launcher, examples, sketch, graphx (JDK 8, hadoop3.2, hive2.3)	32s
Build modules: catalyst, hive-thriftserver (JDK 8, hadoop3.2, hive2.3)	34s
Run docker integration tests	33s
Java 11 build with Maven	32s
Build modules: streaming, sql-kafka-0-10, streaming-kafka-0-10, mllib-local, mllib, yarn, mesos, kubernetes, hadoop-cloud, spark-ganglia-lgpl (JDK 8, hadoop3.2, hive2.3)	35s
Hadoop 2 build with SBT	30s
Java 17 build with Maven	30s
Build modules: hive - slow tests (JDK 8, hadoop3.2, hive2.3)	34s
Linters, licenses, dependencies and documentation generation	1m 12s
Build modules: hive - other tests (JDK 8, hadoop3.2, hive2.3)	37s
Build modules: pyspark-sql, pyspark-mllib, pyspark-resource	1m 23s
Build modules: sql - slow tests (JDK 8, hadoop3.2, hive2.3)	35s
Scala 2.13 build with SBT	32s
Build modules: sparkr	1m 19s
Build modules: pyspark-core, pyspark-streaming, pyspark-ml	1m 26s
Build modules: sql - other tests (JDK 8, hadoop3.2, hive2.3)	35s
Build modules: pyspark-pandas	1m 24s
Run TPC-DS queries with SF=1	33s
Build modules: pyspark-pandas-slow	1m 22s
	15m 18s

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