feat(cubesql): SQL push down multiple window expressions with different sort keys

[MazterQyou]

Check List

• Tests has been run in packages where changes made if available
• Linter has been run for changed code
• Tests for the changes have been added if not covered yet
• Docs have been added / updated if required

Description of Changes Made

This PR adds SQL push down support for multiple window expressions with different sort keys. In cases where there are several window function expressions in a SELECT and they ORDER BY different keys, DataFusion generates several WindowAggr nodes on top of each other, with window expressions grouped by sort keys. Joining them together is invalid in terms of DataFusion logical plan, but having them together in a wrapped select is fine. Related test is added.

[codecov]

Codecov Report

Attention: Patch coverage is 91.95980% with 16 lines in your changes missing coverage. Please review.

Project coverage is 80.30%. Comparing base (044341e) to head (bafcf72).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...ubesql/src/compile/rewrite/rules/wrapper/window.rs	90.47%	16 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #8788       +/-   ##
===========================================
+ Coverage   57.50%   80.30%   +22.79%     
===========================================
  Files         165      395      +230     
  Lines       13504    97508    +84004     
  Branches     2278     2278               
===========================================
+ Hits         7766    78302    +70536     
- Misses       5430    18898    +13468     
  Partials      308      308               

Flag	Coverage Δ
cube-backend	57.50% <ø> (ø)
cubesql	83.96% <91.95%> (?)

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