[SPARK-45755][SQL] Improve Dataset.isEmpty() by applying global limit 1 (apache#251)

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

This PR makes `Dataset.isEmpty()` to execute global limit 1 first. `LimitPushDown` may push down global limit 1 to lower nodes to improve query performance.

Note that we use global limit 1 here, because the local limit cannot be pushed down the group only case: https://github.com/apache/spark/blob/89ca8b6065e9f690a492c778262080741d50d94d/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala#L766-L770

### Why are the changes needed?

Improve query performance.

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

No.

### How was this patch tested?

Manual testing:
```scala
spark.range(300000000).selectExpr("id", "array(id, id % 10, id % 100) as eo").write.saveAsTable("t1")
spark.range(100000000).selectExpr("id", "array(id, id % 10, id % 1000) as eo").write.saveAsTable("t2")
println(spark.sql("SELECT * FROM t1 LATERAL VIEW explode_outer(eo) AS e UNION SELECT * FROM t2 LATERAL VIEW explode_outer(eo) AS e").isEmpty)
```

Before this PR | After this PR
-- | --
<img width="430" alt="image" src="https://github.com/apache/spark/assets/5399861/417adc05-4160-4470-b63c-125faac08c9c"> | <img width="430" alt="image" src="https://github.com/apache/spark/assets/5399861/bdeff231-e725-4c55-9da2-1b4cd59ec8c8">

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes apache#43617 from wangyum/SPARK-45755.

Lead-authored-by: Yuming Wang <[email protected]>
Co-authored-by: Yuming Wang <[email protected]>
Signed-off-by: Jiaan Geng <[email protected]>
(cherry picked from commit c7bba9b)

Author: wangyum

sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala

@@ -651,7 +651,7 @@ class Dataset[T] private[sql](
    * @group basic
    * @since 2.4.0
    */
-  def isEmpty: Boolean = withAction("isEmpty", select().queryExecution) { plan =>
+  def isEmpty: Boolean = withAction("isEmpty", select().limit(1).queryExecution) { plan =>
     plan.executeTake(1).isEmpty
   }