feat: warehouse transformer

[achettyiitr]

Description

• Warehouse transformation as a module.
• It's basically ported from the warehouse module of the rudder-transformer from Javascript to GO.
• More about it can be found in this doc.
• Currently, there is a flag to enable warehouse transformations along with Processor using the flag Processor.enableWarehouseTransformations.
  • Once enabled, we make an API call to the warehouse transformer package.
  • Compare the response, in case we see any differences, we log it for debugging purposes.

Linear Ticket

• Resolves WAR-187

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.

[codecov]

Codecov Report

Attention: Patch coverage is 75.47387% with 427 lines in your changes missing coverage. Please review.

Project coverage is 74.83%. Comparing base (2541b1c) to head (546af2a).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
warehouse/transformer/events.go	56.98%	154 Missing and 74 partials ⚠️
warehouse/transformer/set.go	63.86%	31 Missing and 12 partials ⚠️
processor/processor.go	29.16%	34 Missing ⚠️
warehouse/transformer/logger.go	5.71%	33 Missing ⚠️
warehouse/transformer/testhelper/testhelper.go	20.83%	19 Missing ⚠️
warehouse/transformer/safe.go	92.30%	11 Missing and 4 partials ⚠️
warehouse/transformer/idresolution.go	90.97%	8 Missing and 4 partials ⚠️
warehouse/transformer/testhelper/outputbuilder.go	75.00%	8 Missing and 4 partials ⚠️
warehouse/transformer/transformer.go	93.95%	8 Missing and 1 partial ⚠️
...rmer/internal/reservedkeywords/reservedkeywords.go	73.91%	4 Missing and 2 partials ⚠️
... and 5 more

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #5205     +/-   ##
=========================================
  Coverage   74.82%   74.83%             
=========================================
  Files         440      458     +18     
  Lines       61668    63406   +1738     
=========================================
+ Hits        46145    47448   +1303     
- Misses      12987    13316    +329     
- Partials     2536     2642    +106     

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