feat(cubesql): PlanNormalize - reduce stack allocations (split by path)

[ovr]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.23%. Comparing base (6034850) to head (638c47c).
⚠️ Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
...src/compile/engine/df/optimizers/plan_normalize.rs	75.00%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10067      +/-   ##
==========================================
- Coverage   83.24%   83.23%   -0.01%     
==========================================
  Files         244      244              
  Lines       73483    73485       +2     
==========================================
- Hits        61172    61168       -4     
- Misses      12311    12317       +6     

Flag	Coverage Δ
cubesql	83.23% <75.00%> (-0.01%)	⬇️

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