fix: adding transformer proxy for iterable

[shrouti1507]

What are the changes introduced in this PR?

ref :

• https://api.iterable.com/api/docs#users_updateEmail
• https://api.iterable.com/api/docs#events_track
• https://api.iterable.com/api/docs#users_bulkUpdateUser
• https://api.iterable.com/api/docs#events_trackBulk
• https://api.iterable.com/api/docs#catalogs_bulkUpdateCatalogItems
• https://api.iterable.com/api/docs#users_registerDeviceToken
• https://api.iterable.com/api/docs#users_registerBrowserToken
• https://api.iterable.com/api/docs#commerce_trackPurchase
• https://api.iterable.com/api/docs#commerce_updateCart

What is the related Linear task?

Resolves INT-2901

Please explain the objectives of your changes below

Put down any required details on the broader aspect of your changes. If there are any dependent changes, mandatorily mention them here

Any changes to existing capabilities/behaviour, mention the reason & what are the changes ?

N/A

Any new dependencies introduced with this change?

N/A

Any new generic utility introduced or modified. Please explain the changes.

N/A

Any technical or performance related pointers to consider with the change?

N/A

@coderabbitai review

---

Developer checklist

• My code follows the style guidelines of this project

• No breaking changes are being introduced.

• All related docs linked with the PR?

• All changes manually tested?

• Any documentation changes needed with this change?

• Is the PR limited to 10 file changes?

• Is the PR limited to one linear task?

• Are relevant unit and component test-cases added in new readability format?

Reviewer checklist

• Is the type of change in the PR title appropriate as per the changes?

• Verified that there are no credentials or confidential data exposed with the changes.

[devops-github-rudderstack]

Test report for this run is available at: https://test-integrations-dev.s3.amazonaws.com/integrations-test-reports/rudder-transformer/3878/test-report.html

[codecov]

Codecov Report

Attention: Patch coverage is 90.58824% with 8 lines in your changes missing coverage. Please review.

Project coverage is 90.47%. Comparing base (275e971) to head (9eb31bf).
Report is 6 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/v1/destinations/iterable/commonStrategy.ts	28.57%	5 Missing ⚠️
src/v1/destinations/iterable/responseStrategy.ts	89.47%	2 Missing ⚠️
src/v1/destinations/iterable/networkHandler.ts	95.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3878   +/-   ##
========================================
  Coverage    90.47%   90.47%           
========================================
  Files          615      619    +4     
  Lines        32320    32407   +87     
  Branches      7677     7691   +14     
========================================
+ Hits         29242    29321   +79     
- Misses        2822     2862   +40     
+ Partials       256      224   -32     

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[sonarcloud]

Quality Gate failed

Failed conditions
7 New Major Issues (required ≤ 1)
22 New Code Smells (required ≤ 1)

See analysis details on SonarQube Cloud

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