[SPARK-30106][SQL][TEST] Fix the test of DynamicPartitionPruningSuite

### What changes were proposed in this pull request?
Changed the test **DPP triggers only for certain types of query** in **DynamicPartitionPruningSuite**.

### Why are the changes needed?
The sql has no partition key. The description "no predicate on the dimension table" is not right. So fix it.
```
      Given("no predicate on the dimension table")
      withSQLConf(SQLConf.DYNAMIC_PARTITION_PRUNING_ENABLED.key -> "true") {
        val df = sql(
          """
            |SELECT * FROM fact_sk f
            |JOIN dim_store s
            |ON f.date_id = s.store_id
          """.stripMargin)
```

### Does this PR introduce any user-facing change?
No

### How was this patch tested?
Updated UT

Closes apache#26744 from deshanxiao/30106.

Authored-by: xiaodeshan <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>

Author: xiaodeshan

sql/core/src/test/scala/org/apache/spark/sql/DynamicPartitionPruningSuite.scala

@@ -423,7 +423,7 @@ class DynamicPartitionPruningSuite
           """
             |SELECT * FROM fact_sk f
             |JOIN dim_store s
-            |ON f.date_id = s.store_id
+            |ON f.store_id = s.store_id
           """.stripMargin)
 
         checkPartitionPruningPredicate(df, false, false)