## What changes were proposed in this pull request?
These three condition descriptions should be updated, follow #23228 :
<li>no Ordering is specified,</li>
<li>no Aggregator is specified, and</li>
<li>the number of partitions is less than
<code>spark.shuffle.sort.bypassMergeThreshold</code>.
</li>
1、If the shuffle dependency specifies aggregation, but it only aggregates at the reduce-side, BypassMergeSortShuffle can still be used.
2、If the number of output partitions is spark.shuffle.sort.bypassMergeThreshold(eg.200), we can use BypassMergeSortShuffle.
## How was this patch tested?
N/A
Closes#23281 from lcqzte10192193/wid-lcq-1211.
Authored-by: lichaoqun <li.chaoqun@zte.com.cn>
Signed-off-by: Sean Owen <sean.owen@databricks.com>
f69998ace6