Allowing pre-hashed emails for Criteo Audiences.

[seg-leonelsanches]

Some of our customers want to send a pre-hashed email in their events. This PR allows that.

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 75.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 78.51%. Comparing base (8239ea5) to head (7816437).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
...ations/criteo-audiences/addUserToAudience/index.ts	75.00%	0 Missing and 1 partial ⚠️
...s/criteo-audiences/removeUserFromAudience/index.ts	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2681      +/-   ##
==========================================
- Coverage   78.52%   78.51%   -0.01%     
==========================================
  Files        1032     1032              
  Lines       18632    18630       -2     
  Branches     3530     3530              
==========================================
- Hits        14630    14628       -2     
  Misses       2823     2823              
  Partials     1179     1179              

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