[SPARK-34711][SQL][TESTS] Exercise code-gen enable/disable code paths for SHJ in join test suites

### What changes were proposed in this pull request?

Per comment in #31802 (comment) , we would like to exercise whole stage code-gen enabled and disabled code paths in join unit test suites. This is for better test coverage of shuffled hash join.

### Why are the changes needed?

Better test coverage.

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

Existing and added unit tests here.

Closes #31806 from c21/test-minor.

Authored-by: Cheng Su <chengsu@fb.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
(cherry picked from commit 9aa8f06)
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>

Author: c21

sql/core/src/test/scala/org/apache/spark/sql/execution/joins/ExistenceJoinSuite.scala

@@ -103,7 +103,7 @@ class ExistenceJoinSuite extends SparkPlanTest with SharedSparkSession {
       ProjectExec(output, FilterExec(condition, join))
     }
 
-    test(s"$testName using ShuffledHashJoin") {
+    testWithWholeStageCodegenOnAndOff(s"$testName using ShuffledHashJoin") { _ =>
       extractJoinParts().foreach { case (_, leftKeys, rightKeys, boundCondition, _, _, _) =>
         withSQLConf(SQLConf.SHUFFLE_PARTITIONS.key -> "1") {
           checkAnswer2(leftRows, rightRows, (left: SparkPlan, right: SparkPlan) =>

sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala

@@ -153,7 +153,7 @@ class InnerJoinSuite extends SparkPlanTest with SharedSparkSession {
       }
     }
 
-    test(s"$testName using ShuffledHashJoin (build=left)") {
+    testWithWholeStageCodegenOnAndOff(s"$testName using ShuffledHashJoin (build=left)") { _ =>
       extractJoinParts().foreach { case (_, leftKeys, rightKeys, boundCondition, _, _, _) =>
         withSQLConf(SQLConf.SHUFFLE_PARTITIONS.key -> "1") {
           checkAnswer2(leftRows, rightRows, (leftPlan: SparkPlan, rightPlan: SparkPlan) =>
@@ -165,7 +165,7 @@ class InnerJoinSuite extends SparkPlanTest with SharedSparkSession {
       }
     }
 
-    test(s"$testName using ShuffledHashJoin (build=right)") {
+    testWithWholeStageCodegenOnAndOff(s"$testName using ShuffledHashJoin (build=right)") { _ =>
       extractJoinParts().foreach { case (_, leftKeys, rightKeys, boundCondition, _, _, _) =>
         withSQLConf(SQLConf.SHUFFLE_PARTITIONS.key -> "1") {
           checkAnswer2(leftRows, rightRows, (leftPlan: SparkPlan, rightPlan: SparkPlan) =>

sql/core/src/test/scala/org/apache/spark/sql/execution/joins/OuterJoinSuite.scala

@@ -104,7 +104,7 @@ class OuterJoinSuite extends SparkPlanTest with SharedSparkSession {
       ExtractEquiJoinKeys.unapply(join)
     }
 
-    test(s"$testName using ShuffledHashJoin") {
+    testWithWholeStageCodegenOnAndOff(s"$testName using ShuffledHashJoin") { _ =>
       extractJoinParts().foreach { case (_, leftKeys, rightKeys, boundCondition, _, _, _) =>
         withSQLConf(SQLConf.SHUFFLE_PARTITIONS.key -> "1") {
           val buildSide = if (joinType == LeftOuter) BuildRight else BuildLeft