feat(cubesql): Move dimensions-only projections to dimensions for push-to-Cube wrapper

[mcheshkov]

Check List

• Tests have 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 (if issue reference is not provided)

Turns dimension-only member expressions in projection to dimensions, not measures
This helps with queries like SELECT dim1, ... dimN, mea1, ... meaM FROM cube, whether explicit or implicit (SQL API generate every member in SELECT for zero-member CubeScan in wrapper)

[codecov]

Codecov Report

Attention: Patch coverage is 91.33858% with 11 lines in your changes missing coverage. Please review.

Project coverage is 83.76%. Comparing base (0ad6252) to head (7090a0d).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
...t/cubesql/cubesql/src/compile/engine/df/wrapper.rs	90.90%	11 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #9318   +/-   ##
=======================================
  Coverage   83.75%   83.76%           
=======================================
  Files         229      229           
  Lines       82613    82696   +83     
=======================================
+ Hits        69191    69267   +76     
- Misses      13422    13429    +7     

Flag	Coverage Δ
cubesql	83.76% <91.33%> (+<0.01%)	⬆️

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