chore: Make CometColumnarToRowExec extends CometPlan

[wForget]

Which issue does this PR close?

Closes #.

Rationale for this change

I still see the CometColumnarToRow is not supported fallback reason after #2450, which is not what I expected.

- DPP fallback *** FAILED *** (1 second, 561 milliseconds)
  "CometColumnarToRow is not supported" did not contain "Dynamic Partition Pruning is not supported" (CometExecSuite.scala:120)

What changes are included in this PR?

Make CometColumnarToRowExec extends CometPlan

How are these changes tested?

Test the abnormal case locally, before this:

"CometColumnarToRow is not supported" did not contain "Dynamic Partition Pruning is not supported"
ScalaTestFailureLocation: org.apache.comet.exec.CometExecSuite at (CometExecSuite.scala:120)
org.scalatest.exceptions.TestFailedException: "CometColumnarToRow is not supported" did not contain "Dynamic Partition Pruning is not supported"
	at org.scalatest.Assertions.newAssertionFailedException(Assertions.scala:472)

after this:

"" did not contain "Dynamic Partition Pruning is not supported"
ScalaTestFailureLocation: org.apache.comet.exec.CometExecSuite at (CometExecSuite.scala:120)
org.scalatest.exceptions.TestFailedException: "" did not contain "Dynamic Partition Pruning is not supported"
	at org.scalatest.Assertions.newAssertionFailedException(Assertions.scala:472)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.49%. Comparing base (f09f8af) to head (c9c9f72).
⚠️ Report is 1167 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2460      +/-   ##
============================================
+ Coverage     56.12%   58.49%   +2.36%     
- Complexity      976     1440     +464     
============================================
  Files           119      146      +27     
  Lines         11743    13507    +1764     
  Branches       2251     2349      +98     
============================================
+ Hits           6591     7901    +1310     
- Misses         4012     4375     +363     
- Partials       1140     1231      +91     

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