[CORE] Bad mutable query plan nodes

[zhztheplayer]

Description

Spark / Gluten query planner requires heavily on plan immutability.

Currently there are some (unlimited to) code snippets potentially making plans mutable:

1. WholeStageTransformer.setOutputSchemaForPlan (CH)

   incubator-gluten/gluten-substrait/src/main/scala/org/apache/gluten/execution/WholeStageTransformer.scala

   Lines 234 to 241 in 15f4cde

   	def setOutputSchemaForPlan(expectOutput: Seq[Attribute]): Unit = {
   	if (outputSchemaForPlan.isDefined) {
   	return
   	}
   	// Fixes issue-1874
   	outputSchemaForPlan = Some(inferSchemaFromAttributes(expectOutput))
   	}

2. BatchScanExecTransformer.setPushDownFilters (VL + CH)

   incubator-gluten/gluten-substrait/src/main/scala/org/apache/gluten/execution/BatchScanExecTransformer.scala

   Lines 102 to 104 in 15f4cde

   	def setPushDownFilters(filters: Seq[Expression]): Unit = {
   	pushdownFilters = Some(filters)
   	}

Should find a way to optimize against the code to make relevant plan immutable.