Validate iam for liveramp S3

[nk1107]

JIRA - https://twilio-engineering.atlassian.net/browse/STRATCONN-6015?atlOrigin=eyJpIjoiMzg0OGZlYWY3MDhjNDE5YWJlNjc1NDA1MjBhMjQ3YjYiLCJwIjoiaiJ9

This change adds a validation logic to validate the IAM role for the liveramp audienceEnteredS3 action. This is done using HEAD request to the S3 bucket with the IAM credentials in the mappings.
Number of batch events processed by liveramp in 1 day

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

❌ Patch coverage is 73.91304% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.61%. Comparing base (67a677e) to head (fa3c140).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...nations/liveramp-audiences/audienceEnteredS3/s3.ts	68.42%	4 Missing and 2 partials ⚠️

❌ Your patch check has failed because the patch coverage (73.91%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3209      +/-   ##
==========================================
- Coverage   79.62%   79.61%   -0.01%     
==========================================
  Files        1177     1177              
  Lines       21703    21722      +19     
  Branches     4220     4228       +8     
==========================================
+ Hits        17282    17295      +13     
- Misses       3679     3683       +4     
- Partials      742      744       +2     

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