CSE unit test for duplicate fields

[waynexia]

Signed-off-by: Ruihang Xia waynestxia@gmail.com

Which issue does this PR close?

Ref #2715

Rationale for this change

#2715 fixed that CSE intermediate projection plan may contain duplicate fields but forget to add a UT to cover it.

This UT test the behavior by trying to build intermediate projection plan twice with the same input. To simulate (sort of) the original scenario that calls optimizer twice. cc @alamb

What changes are included in this PR?

add an UT redundant_project_fields

Are there any user-facing changes?

[codecov-commenter]

Codecov Report

Merging #2747 (43d5fba) into master (8adc1b6) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2747   +/-   ##
=======================================
  Coverage   84.93%   84.93%           
=======================================
  Files         270      270           
  Lines       47915    47926   +11     
=======================================
+ Hits        40695    40706   +11     
  Misses       7220     7220           

Impacted Files	Coverage Δ
...tafusion/optimizer/src/common_subexpr_eliminate.rs	94.11% <100.00%> (+0.17%)	⬆️
datafusion/expr/src/window_frame.rs	92.43% <0.00%> (-0.85%)	⬇️
datafusion/core/src/physical_plan/hash_join.rs	96.12% <0.00%> (ø)
datafusion/optimizer/src/utils.rs	34.21% <0.00%> (+0.52%)	⬆️

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[alamb]

Thank you @waynexia 👍