[VL] RAS: Integrate filter rules into enumerated transform (#5367)

.gitattributes

@@ -0,0 +1 @@
+backends-velox/src/test/resources/tpch-approved-plan/** linguist-generated

backends-velox/src/main/scala/org/apache/gluten/execution/FilterExecTransformer.scala

@@ -21,6 +21,8 @@ import org.apache.spark.sql.execution.SparkPlan
 
 case class FilterExecTransformer(condition: Expression, child: SparkPlan)
   extends FilterExecTransformerBase(condition, child) {
+  // FIXME: Should use field "condition" to store the actual executed filter expressions.
+  //  To make optimization easier (like to remove filter when it actually does nothing)
   override protected def getRemainingCondition: Expression = {
     val scanFilters = child match {
       // Get the filters including the manually pushed down ones.