Optimize quals on segmentby columns in ColumnarScan

[erimatnor]

When filtering arrow slots in ColumnarScan, quals on segmentby columns should be executed separately from those on other columns because they don't require decompression and might filter the whole arrow slot in one go. Furthermore, the quals only need to be applied once per arrow slot since the segmentby value is the same for all compressed rows in the slot.

This will speed up scans when filters on segmentby columns cannot be pushed down to Hypercore TAM as scankeys. For example, " IN (1, 2, 3)" won't be pushed down as a scankey because only index scans support scankeys with such scalar array expressions.

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Disable-check: commit-count

[codecov]

Codecov Report

Attention: Patch coverage is 82.14286% with 15 lines in your changes missing coverage. Please review.

Project coverage is 81.34%. Comparing base (59f50f2) to head (8070393).
Report is 737 commits behind head on main.

Files with missing lines	Patch %	Lines
tsl/src/nodes/columnar_scan/columnar_scan.c	80.35%	1 Missing and 10 partials ⚠️
tsl/src/hypercore/hypercore_handler.c	60.00%	0 Missing and 2 partials ⚠️
tsl/src/hypercore/arrow_tts.h	88.88%	0 Missing and 1 partial ⚠️
tsl/src/hypercore/vector_quals.c	92.85%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7661      +/-   ##
==========================================
+ Coverage   80.06%   81.34%   +1.28%     
==========================================
  Files         190      242      +52     
  Lines       37181    44890    +7709     
  Branches     9450    11202    +1752     
==========================================
+ Hits        29770    36518    +6748     
- Misses       2997     3981     +984     
+ Partials     4414     4391      -23     

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[mkindahl]

Pretty short one, so not really any comments. You might want to use more distinctive names to make the code easier to maintain and see if you can add tests for the branches not covered.