fix(cubesql): Fix SELECT DISTINCT on pushdown

[KSDaemon]

This PR fixes correct Cube query generation for SELECT DISTINCT xxxx queries via SQL API.

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

[codecov]

Codecov Report

Attention: Patch coverage is 98.98477% with 2 lines in your changes missing coverage. Please review.

Project coverage is 83.11%. Comparing base (d130dbc) to head (84fdb24).
Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
...besql/cubesql/src/compile/rewrite/rules/members.rs	96.15%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9144      +/-   ##
==========================================
+ Coverage   83.07%   83.11%   +0.03%     
==========================================
  Files         226      226              
  Lines       79607    79802     +195     
==========================================
+ Hits        66136    66329     +193     
- Misses      13471    13473       +2     

Flag	Coverage Δ
cubesql	83.11% <98.98%> (+0.03%)	⬆️

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