feat: add support for hash to bingads offline conversions

[ItsSudip]

Description

We are adding support for hashing email and phone for bingads offline conversion destination.

Linear Ticket

resolves INT-3019

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.

[codecov]

Codecov Report

Attention: Patch coverage is 78.26087% with 10 lines in your changes missing coverage. Please review.

Project coverage is 74.72%. Comparing base (989310c) to head (9ba863b).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...nationmanager/bing-ads/offline-conversions/util.go	78.12%	5 Missing and 2 partials ⚠️
...ager/bing-ads/offline-conversions/bulk_uploader.go	76.92%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5390      +/-   ##
==========================================
- Coverage   74.78%   74.72%   -0.06%     
==========================================
  Files         438      438              
  Lines       61296    61331      +35     
==========================================
- Hits        45838    45830       -8     
- Misses      12923    12951      +28     
- Partials     2535     2550      +15     

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