Fix topk emitted batches metric

[cetra3]

Which issue does this PR close?

• ClosesSortExec (TopK) output_batches metric does not match the number of emitted batches #24468
• ClosesPartitionedTopKExec does not expose any metrics (metrics() returns None) #24470

Rationale for this change

Fixes some issues around metrics and TopK execution nodes

What changes are included in this PR?

Adjusts to include metrics in PartitionedTopKExec and also fixes the batch count in TopK

Are these changes tested?

Yes new tests added.

Are there any user-facing changes?

No new traits, etc.. just fixes some bugs on the physical plan side

[codecov-commenter]

Codecov Report

❌ Patch coverage is 87.17949% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.45%. Comparing base (1f5be0e) to head (021451f).

Files with missing lines	Patch %	Lines
datafusion/physical-plan/src/topk/mod.rs	86.66%	5 Missing and 5 partials ⚠️

Additional details and impacted files

@@ Coverage Diff @@## main #24481 +/- ##
==========================================
- Coverage 81.45% 81.45% -0.01% 
==========================================
Files 1118 1118 Lines 399555 399627 +72 Branches 399555 399627 +72 ==========================================
+ Hits 325462 325516 +54 - Misses 55097 55107 +10 - Partials 18996 19004 +8 

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[jayzhan211]

Thanks @cetra3

[alamb]

Thank you @cetra3 and @jayzhan211

[kumarUjjawal]

hmm! there seems to be some issue with spark actions. I will manually trigger the re-run see if that fixes it.

[kumarUjjawal]

@cetra3 looks like you will have to rebase with main once.

[kumarUjjawal]

Thank you @cetra3 for resolving the issue.