fix(cubesql): Allow yyyy, dd, mi, ss in to_timestamp

[MazterQyou]

Check List

• Tests has 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)

This PR adds support for yyyy, dd, mi, ss lowercase placeholders in format string of to_timestamp function. These are used by QuickSight. It also adds a related test.

[codecov]

Codecov Report

Merging #5218 (e7c8099) into master (7a6f8f9) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #5218      +/-   ##
==========================================
+ Coverage   74.68%   74.71%   +0.02%     
==========================================
  Files         270      270              
  Lines       31544    31567      +23     
  Branches     2918     2918              
==========================================
+ Hits        23559    23585      +26     
+ Misses       7481     7478       -3     
  Partials      504      504              

Flag	Coverage Δ
cube-backend	60.08% <ø> (ø)
cubesql	83.20% <100.00%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
rust/cubesql/cubesql/src/compile/engine/udf.rs	86.84% <ø> (ø)
rust/cubesql/cubesql/src/compile/mod.rs	81.44% <100.00%> (+0.10%)	⬆️
rust/cubesql/cubesql/src/sql/statement.rs	74.74% <0.00%> (+0.34%)	⬆️

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[ovr]

LGTM