### What changes were proposed in this pull request?
When write test about command, when `checkAnswer`,
Always got error as below
```
[info] AttributeSet(partition#607) was not empty The analyzed logical plan has missing inputs:
[info] ShowPartitionsCommand `ns`.`tbl`, [partition#607] (QueryTest.scala:224)
[info] org.scalatest.exceptions.TestFailedException:
[info] at org.scalatest.Assertions.newAssertionFailedException(Assertions.scala:472)
[info] at org.scalatest.Assertions.newAssertionFailedException$(Assertions.scala:471)
```
For Command DDL plan, we can define `producedAttributes` as it's `outputSet` and it's reasonable
### Why are the changes needed?
Add default `producedAttributes` for Command LogicalPlan
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
Not need
Closes#31342 from AngersZhuuuu/SPARK-34241.
Authored-by: Angerszhuuuu <angers.zhu@gmail.com>
Signed-off-by: Wenchen Fan <wenchen@databricks.com>
dd88eff820