fix: remove the erroneous warn function

[abhimanyubabbar]

Description of the change

With recent refactoring efforts on the transformations action code to improve the code coverage etc, we added a warning log using actions/core with convention as core.warn(). This was added in the release v1.1.1. Changes in the PR:

1. This was a breaking change as the fn doesn't exist. The test covering the codepath also wasn't present at that time which resulted in the change going in undetected. This change fixes it by removing the warn log altogether.

2. We also have added tests now for covering some of the missing paths in the action code.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Related issues

Fix #1

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers mentioned in a comment
• Changes have been reviewed by at least one other engineer
• Issue from task tracker has a link to this pull request

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.87%. Comparing base (6419813) to head (95e8102).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #44      +/-   ##
==========================================
+ Coverage   83.33%   89.87%   +6.54%     
==========================================
  Files           1        1              
  Lines         162      158       -4     
  Branches       34       33       -1     
==========================================
+ Hits          135      142       +7     
+ Misses         26       16      -10     
+ Partials        1        0       -1     

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