[Klaviyo Actions] | Added MultiStatus Batch Support on TrackEvent

[Innovative-GauravKochar]

Jira Ticket
This pull request aims to add batch support for the TrackEvent action in Klaviyo(Actions). Additionally, this PR includes the validation and conversion of phone numbers to E164 format for TrackEvent, as there is a separate PR (#2481) currently under review. These changes are essential and should be included.

Local & Stage Testing Documentation

Testing

Include any additional information about the testing you have completed to
ensure your changes behave as expected. For a speedy review, please check
any of the tasks you completed below during your testing.

• Added unit tests for new functionality
• Tested end-to-end using the local server
• [If destination is already live] Tested for backward compatibility of destination. Note: New required fields are a breaking change.
• [Segmenters] Tested in the staging environment
• [Segmenters] [If applicable for this change] Tested for regression with Hadron.

[codecov]

Codecov Report

Attention: Patch coverage is 80.70175% with 11 lines in your changes missing coverage. Please review.

Project coverage is 78.01%. Comparing base (1f43695) to head (5375521).
Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
...tion-actions/src/destinations/klaviyo/functions.ts	78.43%	4 Missing and 7 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2498      +/-   ##
==========================================
- Coverage   78.45%   78.01%   -0.44%     
==========================================
  Files        1044      991      -53     
  Lines       19945    17436    -2509     
  Branches     4003     3292     -711     
==========================================
- Hits        15647    13602    -2045     
+ Misses       3204     2740     -464     
  Partials     1094     1094              

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[sayan-das-in]

Thank you for making this change. The core MultiStatus logic looks good, however I have left some review comments mostly to refactor and simplify the code as these will be listed as examples for external contributors.

As the changes are related to refactoring, please test it once again via unit tests, local and staging after committing the changes just to be sure it doesn't break anything.