feat(cubesql): Support SQL push down for several functions

[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

This PR adds SQL push down support for these functions:

• ASCII
• ATAN2
• BTRIM
• CHAR_LENGTH
• COT
• DATEDIFF
• DEGREES
• LTRIM
• RADIANS
• REPLACE
• RTRIM
• SIGN
• STRPOS
• TO_CHAR

It also fixes an issue with pushing down DLOG10 in Redshift.

[codecov]

Codecov Report

Attention: 20 lines in your changes are missing coverage. Please review.

Comparison is base (9c0ad07) 47.76% compared to head (b53e79e) 71.67%.
Report is 2 commits behind head on master.

Files	Patch %	Lines
...t/cubesql/cubesql/src/compile/engine/df/wrapper.rs	61.11%	7 Missing ⚠️
...ubejs-schema-compiler/src/adapter/RedshiftQuery.ts	0.00%	5 Missing ⚠️
...ubejs-schema-compiler/src/adapter/BigqueryQuery.ts	0.00%	4 Missing ⚠️
...bejs-schema-compiler/src/adapter/SnowflakeQuery.ts	0.00%	2 Missing ⚠️
...ubejs-schema-compiler/src/adapter/PostgresQuery.ts	0.00%	1 Missing ⚠️
rust/cubesql/cubesql/src/compile/mod.rs	96.77%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #7431       +/-   ##
===========================================
+ Coverage   47.76%   71.67%   +23.91%     
===========================================
  Files         155      329      +174     
  Lines       20852    54581    +33729     
  Branches     5369     5369               
===========================================
+ Hits         9960    39123    +29163     
- Misses      10141    14713     +4572     
+ Partials      751      745        -6     

Flag	Coverage Δ
cube-backend	48.02% <14.28%> (+0.26%)	⬆️
cubesql	86.31% <84.31%> (?)

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