refactor(iterator): simplify virtual function list

[aceforeverd]

No description provided.

[codecov]

Codecov Report

Attention: 198 lines in your changes are missing coverage. Please review.

Comparison is base (23d7c50) 75.31% compared to head (29d906b) 75.33%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3571      +/-   ##
============================================
+ Coverage     75.31%   75.33%   +0.02%     
  Complexity      587      587              
============================================
  Files           719      717       -2     
  Lines        129836   129880      +44     
  Branches       1280     1280              
============================================
+ Hits          97787    97850      +63     
+ Misses        31763    31760       -3     
+ Partials        286      270      -16     

Files	Coverage Δ
...bridse/examples/toydb/src/tablet/tablet_catalog.cc	66.66% <ø> (+9.34%)	⬆️
...amples/toydb/src/testing/toydb_engine_test_base.cc	73.46% <100.00%> (-0.54%)	⬇️
hybridse/include/codec/row.h	95.00% <100.00%> (ø)
hybridse/include/codec/row_list.h	89.28% <100.00%> (+24.06%)	⬆️
hybridse/include/vm/simple_catalog.h	80.00% <ø> (ø)
...idse/src/passes/physical/batch_request_optimize.cc	90.62% <100.00%> (+0.26%)	⬆️
...dse/src/passes/physical/group_and_sort_optimized.h	100.00% <100.00%> (ø)
...e/src/passes/physical/transform_up_physical_pass.h	75.00% <ø> (ø)
hybridse/src/plan/planner.cc	88.27% <100.00%> (ø)
hybridse/src/testing/engine_test_base.cc	80.54% <100.00%> (+0.04%)	⬆️
... and 19 more

... and 20 files with indirect coverage changes

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[aceforeverd]

included in #3576