feat(cubesql): Support round() function with two parameters

[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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.10%. Comparing base (dd53c38) to head (c337b5b).
Report is 5 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #9594   +/-   ##
=======================================
  Coverage   84.10%   84.10%           
=======================================
  Files         230      230           
  Lines       84440    84458   +18     
=======================================
+ Hits        71015    71033   +18     
  Misses      13425    13425           

Flag	Coverage Δ
cubesql	84.10% <100.00%> (+<0.01%)	⬆️

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