fix: Implement producedAttributes for CometWindowExec

[rahulbabarwal89]

Which issue does this PR close?

Current plan for windows is

  val df = sql("SELECT a, b, c, SUM(c) OVER (PARTITION BY a) as sum_c FROM window_test")

+- !CometWindowExec [a#19, b#20, c#21, sum_c#25L], [sum(c#21) windowspecdefinition(a#19, specifiedwindowframe(RowFrame, unboundedpreceding$(), unboundedfollowing$())) AS sum_c#25L], [a#19]
+- CometSort [a#19, b#20, c#21], [a#19 ASC NULLS FIRST]
+- CometExchange hashpartitioning(a#19, 10), ENSURE_REQUIREMENTS, CometNativeShuffle, [plan_id=87]
+- CometScan [native_iceberg_compat] parquet [a#19,b#20,c#21] Batched: true, DataFilters: [], Format: CometParquet, Location: InMemoryFileIndex(1 paths)[file:/private/var/folders/6f/_s1vnnd55zgfkx7zlwnrnv0h0000gn/T/spark-89..., PartitionFilters: [], PushedFilters: [], ReadSchema: struct<a:int,b:int,c:int>

The exclamation mark usually means discrepancy for outputAttributes

Closes #2710.

Rationale for this change

What changes are included in this PR?

How are these changes tested?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 58.30%. Comparing base (f09f8af) to head (2280812).
⚠️ Report is 706 commits behind head on main.

Files with missing lines	Patch %	Lines
...a/org/apache/spark/sql/comet/CometWindowExec.scala	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2789      +/-   ##
============================================
+ Coverage     56.12%   58.30%   +2.17%     
- Complexity      976     1422     +446     
============================================
  Files           119      157      +38     
  Lines         11743    14115    +2372     
  Branches       2251     2365     +114     
============================================
+ Hits           6591     8230    +1639     
- Misses         4012     4694     +682     
- Partials       1140     1191      +51     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[wForget]

@rahulbabarwal89 Thanks for your work. CometWindowExec was disabled in #2726, but this change looks good to me.

[wForget]

I verified this change locally, and it is ​​as expected.

[comphead]

Thanks @rahulbabarwal89 thats a nice contribution to fix windows.
And thanks @wForget for the review

[comphead]

As a followup I'm planning to amend checkSparkAnswerAndOperator to also track there is no exclamation marks for Comet operators