Add sovrn cookie to privacy center

[allisonking]

Part of #2458

Code Changes

• Refactor inspectForBrowserIdentities to be able to handle more than one cookie value
• Update tests

Steps to Confirm

• Spin up the privacy center
• Add a cookie to your browser i.e. document.cookie = "ljt_readerID=fides_test_reader_id;";
• Change your consent preferences
• Inspect the network tab, and you should see ljt_readerID show up in the payload for PATCH preferences under browser_identity

Pre-Merge Checklist

• All CI Pipelines Succeeded
• Documentation:
  • documentation complete, PR opened in fidesdocs
  • documentation issue created in fidesdocs
• Issue Requirements are Met
• Relevant Follow-Up Issues Created
• Update CHANGELOG.md

Description Of Changes

Write some things here about the changes and any potential caveats

[cypress]

Passing run #107 ↗︎

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3

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Details:

Merge 5dee01e into e56bfdf...
Project: fides	Commit: 101b96f5a5 ℹ️
Status: Passed	Duration: 00:38 💡
Started: Feb 15, 2023 3:54 PM	Ended: Feb 15, 2023 3:55 PM

_{This comment has been generated by cypress-bot as a result of this project's GitHub integration settings.}

[codecov]

Codecov Report

Base: 88.90% // Head: 86.05% // Decreases project coverage by -2.86% ⚠️

Coverage data is based on head (5dee01e) compared to base (892d123).
Patch has no changes to coverable lines.

Additional details and impacted files

@@                      Coverage Diff                       @@
##           fides_2394_sovrn_connector    #2582      +/-   ##
==============================================================
- Coverage                       88.90%   86.05%   -2.86%     
==============================================================
  Files                             335      289      -46     
  Lines                           16378    15760     -618     
  Branches                         4548     1983    -2565     
==============================================================
- Hits                            14561    13562     -999     
- Misses                           1658     1818     +160     
- Partials                          159      380     +221     

Impacted Files	Coverage Δ
.../ops/service/messaging/message_dispatch_service.py	46.79% <0.00%> (-28.58%)	⬇️
...ides/api/ops/email_templates/get_email_template.py	62.50% <0.00%> (-18.75%)	⬇️
src/fides/api/ctl/routes/util.py	64.51% <0.00%> (-16.13%)	⬇️
src/fides/api/ops/db/base_class.py	71.42% <0.00%> (-15.24%)	⬇️
src/fides/core/annotate_dataset.py	21.12% <0.00%> (-14.49%)	⬇️
src/fides/api/ops/schemas/api.py	80.00% <0.00%> (-11.67%)	⬇️
src/fides/lib/db/session.py	78.57% <0.00%> (-11.09%)	⬇️
.../fides/api/ops/service/connectors/sql_connector.py	76.14% <0.00%> (-10.64%)	⬇️
.../service/privacy_request/request_runner_service.py	77.06% <0.00%> (-10.20%)	⬇️
src/fides/core/config/notification_settings.py	90.00% <0.00%> (-10.00%)	⬇️
... and 258 more

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[pattisdr]

Nice changes here, building on what you already established with the ga client ids!