Iterable Erasure Integration

[MarcGEthyca]

Closes #

Description Of Changes

Write some things here about the changes and any potential caveats

Code Changes

• [ ] Erasure support for Iterable

Pre-PR checklist

• [X] Secrets added to 1Password
  • [X] Values for connector_params
  • [X] Any identity values, such as identity_email or identity_phone_number
• [X] Postman collection
  • [X] All requests in the SaaS config
  • [X] All requests to create test data
• [X] Erasure tests passing
• [x] Documentation:
  • [x] documentation complete, PR opened in fidesdocs https://github.com/ethyca/fidesdocs/pull/334
  • [x] documentation issue created in fidesdocs https://github.com/ethyca/fidesdocs/issues/335
  • [x] Connector Specification doc completed https://ethyca.atlassian.net/wiki/spaces/EN/pages/2968092673/Iterable+Integration+Specification

Steps to Confirm

• [ ] Add/configure the connector in UI
• [ ] Verify config and icon UI looks good
• [ ] Create an Access DSR with the identity value
• [ ] Verify email sent by Fides with customer data is correct

Pre-Merge Checklist

• [ ] All CI Pipelines Succeeded
• [ ] Issue Requirements are Met
• [x] Relevant Follow-Up Issues Created
• [x] For API changes, the Postman collection has been updated
• [ ] Update CHANGELOG.md