fix(cubesql): Normalize EXTRACT/DATE_TRUNC granularities

[MazterQyou]

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

This PR fixes issues with rewrites not working correctly when granularities in EXTRACT, DATE_PART, or DATE_TRUNC functions are not of the letter case expected by some rewrite rules by normalizing the granularities across all plans. Related tests are adjusted.

[codecov]

Codecov Report

Attention: Patch coverage is 80.52910% with 184 lines in your changes missing coverage. Please review.

Project coverage is 84.26%. Comparing base (93a4dcb) to head (bd1e04a).
Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
...src/compile/engine/df/optimizers/plan_normalize.rs	85.68%	123 Missing ⚠️
...sql/cubesql/src/compile/rewrite/rules/old_split.rs	0.00%	61 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #9759    +/-   ##
========================================
  Coverage   84.25%   84.26%            
========================================
  Files         231      232     +1     
  Lines       85650    86443   +793     
========================================
+ Hits        72163    72838   +675     
- Misses      13487    13605   +118     

Flag	Coverage Δ
cubesql	84.26% <80.52%> (+<0.01%)	⬆️

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