Comet Native Executors: let the native planner reject every JVM callback, and drop the driver's list #7375

What is the problem the feature request solves?

The driver (#7289) refuses a block whose plan calls back into the JVM by looking for message names in a hand-kept list (JvmScalarUdf, ArrowPythonUdf). The native planner separately refuses JVM calls when it plans a block with native inputs, through require_jvm, but not for ArrowPythonUdf. The two lists can drift apart, and the driver walks every block once more to check.

Describe the potential solution

Call require_jvm for ArrowPythonUdf in PhysicalPlanner, so the native planner refuses every JVM callback. The scheduler already plans every block when it checks a query, so the driver's list and its walk can go.

Additional context

The driver's list is jvmCallbacks in CometNativeExecutorsExec.scala.

Part of #7288.

Willingness to contribute

Yes. I can contribute this feature independently.