refactor(stream): refine TopNExecutorBase

[TennyZhuang]

Signed-off-by: TennyZhuang zty0826@gmail.com

What's changed and what's your intention?

Similar to #1795

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests

Refer to a related PR or issue link (optional)

[BugenZhao]

L💦TM!

[codecov]

Codecov Report

Merging #1822 (07f8a99) into main (747d2d1) will increase coverage by 0.05%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1822      +/-   ##
==========================================
+ Coverage   70.74%   70.80%   +0.05%     
==========================================
  Files         608      608              
  Lines       79523    79561      +38     
==========================================
+ Hits        56261    56330      +69     
+ Misses      23262    23231      -31     

Flag	Coverage Δ
rust	70.80% <0.00%> (+0.05%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/stream/src/executor_v2/top_n.rs	90.64% <0.00%> (-1.16%)	⬇️
src/stream/src/executor_v2/top_n_appendonly.rs	92.74% <0.00%> (+0.35%)	⬆️
src/stream/src/executor_v2/top_n_executor.rs	57.89% <ø> (+12.06%)	⬆️
src/frontend/src/handler/create_source.rs	96.87% <0.00%> (-0.58%)	⬇️
...c/frontend/src/optimizer/plan_node/logical_join.rs	84.90% <0.00%> (-0.25%)	⬇️
...rc/frontend/src/optimizer/plan_node/logical_agg.rs	97.35% <0.00%> (-0.15%)	⬇️
...frontend/src/optimizer/plan_node/logical_filter.rs	97.79% <0.00%> (-0.11%)	⬇️
...rontend/src/optimizer/plan_node/logical_project.rs	97.15% <0.00%> (-0.09%)	⬇️
src/frontend/src/handler/describe.rs	98.91% <0.00%> (ø)
...tend/src/optimizer/plan_node/stream_materialize.rs	89.44% <0.00%> (ø)
... and 12 more

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