chore: Improvements of fallback info

[wForget]

Which issue does this PR close?

Closes #2449.

Rationale for this change

Some improvements of fallback info:

• Ignore unsupported info for CometSparkRowToColumnar: CometSparkRowToColumnar is not supported
• ReusedExchangeExec will break the children extended Infos

What changes are included in this PR?

How are these changes tested?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.06%. Comparing base (f09f8af) to head (3521ccb).
⚠️ Report is 537 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2450      +/-   ##
============================================
+ Coverage     56.12%   58.06%   +1.93%     
- Complexity      976     1401     +425     
============================================
  Files           119      146      +27     
  Lines         11743    13466    +1723     
  Branches       2251     2342      +91     
============================================
+ Hits           6591     7819    +1228     
- Misses         4012     4413     +401     
- Partials       1140     1234      +94     

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[mbutrovich]

Thanks @wForget! I'm sure this will be helpful for everyone trying to understand how to get more Comet plans running natively. Do you have a before/after example of the output?

[andygrove]

Thanks @wForget. The changes look reasonable to me. It would be nice to have a test to prevent regressions, but I'm happy to merge these changes without it.

[wForget]

@mbutrovich @andygrove Thank you for your review, and sorry for missing the How are these changes tested? information.

This improvements come from two unexpected checks in the failing CometExpressionSuite.'explain comet' test case:

datafusion-comet/spark/src/test/scala/org/apache/comet/CometExpressionSuite.scala

Line 1928 in a806bf0

Set("Comet shuffle is not enabled: spark.comet.exec.shuffle.enabled is not enabled")),

datafusion-comet/spark/src/test/scala/org/apache/comet/CometExpressionSuite.scala

Lines 1934 to 1936 in a806bf0

	Set(
	"Cast from CalendarIntervalType to StringType is not supported",
	"Comet shuffle is not enabled: spark.comet.exec.shuffle.enabled is not enabled")),

1. The first failure occurs because of the extra message CometSparkRowToColumnar is not supported. The error looked like this:

- explain comet *** FAILED *** (720 milliseconds)
  Comet shuffle is not enabled: spark.comet.exec.shuffle.enabled is not enabled
  CometSparkRowToColumnar is not supported != Comet shuffle is not enabled: spark.comet.exec.shuffle.enabled is not enabled (case-insensitive comparison) (CometTestBase.scala:299)

2. The second failure happens because ReusedExchangeExec exists in the SparkPlan, which causes the expected Comet shuffle is not enabled... message to be missing. The error looked like this:

Cast from CalendarIntervalType to StringType is not supported != Cast from CalendarIntervalType to StringType is not supported
Comet shuffle is not enabled: spark.comet.exec.shuffle.enabled is not enabled

After this fix, these checks work as expected