feat(cubesql): Add separate ungrouped_scan flag to wrapper replacer context

[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)

It is used to track whether WrappedSelect actually wraps ungrouped scan as opposed to old flag, which is used as push to Cube enabler.

Changes in cost are necessary because now ungrouped scans are tracked, we are getting proper values in wrapped_select_ungrouped_scan cost component, it would count the WrappedSelect(ungrouped_scan=true) nodes in extracted plan. And with old cost it would turns any ungrouped scan under wrapper more expensive than plan with same amount of wrappers (usually it's just 1 anyway), but with more nodes outside wrapper. Consider consuming projection: Projection(WrappedSelect(ungrouped_scan=true)) vs WrappedSelect(from=WrappedSelect(ungrouped_scan=true), ungrouped_scan=true). Plan with Projection would have ast_size_outside_wrapper=1 wrapped_select_ungrouped_scan=1, plan with WrappedSelect - ast_size_outside_wrapper=0 wrapped_select_ungrouped_scan=2, and second one is preferrable.

Also couple of related fixes:

• Mark distinct WrappedSelect as grouped
• Depend on a ungrouped flag for grouped join part: Wrapper can be ungrouped=true, push_to_cube=false, and this is unexpected in ungrouped-grouped join.

[codecov]

Codecov Report

Attention: Patch coverage is 97.89030% with 5 lines in your changes missing coverage. Please review.

Project coverage is 83.07%. Comparing base (39190e0) to head (fd99643).

Files with missing lines	Patch %	Lines
...ubesql/src/compile/rewrite/rules/wrapper/filter.rs	95.65%	2 Missing ⚠️
...ql/src/compile/rewrite/rules/wrapper/projection.rs	96.07%	2 Missing ⚠️
...compile/rewrite/rules/wrapper/cube_scan_wrapper.rs	91.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9120      +/-   ##
==========================================
+ Coverage   83.03%   83.07%   +0.03%     
==========================================
  Files         226      226              
  Lines       79482    79672     +190     
==========================================
+ Hits        66000    66184     +184     
- Misses      13482    13488       +6     

Flag	Coverage Δ
cubesql	83.07% <97.89%> (+0.03%)	⬆️

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