style: fix warnings on latest clippy

[xxchan]

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What's changed and what's your intention?

picked from #5119

[codecov]

Codecov Report

Merging #5876 (98cc624) into main (0f0e6c5) will decrease coverage by 0.17%.
The diff coverage is 40.38%.

@@            Coverage Diff             @@
##             main    #5876      +/-   ##
==========================================
- Coverage   75.09%   74.92%   -0.18%     
==========================================
  Files         920      921       +1     
  Lines      145144   145701     +557     
==========================================
+ Hits       108996   109162     +166     
- Misses      36148    36539     +391     

Flag	Coverage Δ
rust	74.92% <40.38%> (-0.18%)	⬇️

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

Impacted Files	Coverage Δ
src/batch/src/executor/hop_window.rs	69.10% <0.00%> (-0.57%)	⬇️
src/batch/src/executor/join/lookup_join.rs	58.05% <0.00%> (ø)
src/common/src/types/ordered_float.rs	29.70% <0.00%> (-0.20%)	⬇️
...c/connector/src/source/nexmark/source/generator.rs	0.00% <ø> (ø)
src/ctl/src/cmd_impl/hummock/compaction_group.rs	0.00% <0.00%> (ø)
src/ctl/src/lib.rs	0.92% <0.00%> (-0.49%)	⬇️
src/expr/src/expr/expr_binary_nonnull.rs	79.25% <0.00%> (-2.22%)	⬇️
src/expr/src/vector_op/arithmetic_op.rs	47.67% <0.00%> (-4.64%)	⬇️
src/frontend/src/lib.rs	40.00% <0.00%> (-3.48%)	⬇️
...frontend/src/optimizer/plan_node/batch_sort_agg.rs	75.60% <0.00%> (+1.80%)	⬆️
... and 78 more

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