Rely on client to detect new notices for prefetched experiences

[eastandwestwind]

Closes #4001

Description Of Changes

This PR removes the need for fides_user_device_id in pre-fetched experience. Instead, pre-fetched experience now returns no user consent. It now relies on the client cookie, if exists, to populate any existing consent for all notices.

Code Changes

• Add code to populate user consent for any pre-fetched experience provided the Fides cookie exists
• Ensure that fides_user_device_id query param is not passed to the fides API if it does not exist

Steps to Confirm

• Add relevant Fides configs to ensure a banner will show up for your region
• Use the following env vars:

FIDES_PRIVACY_CENTER__DEBUG=true
FIDES_PRIVACY_CENTER__IS_OVERLAY_ENABLED=true
FIDES_PRIVACY_CENTER__IS_PREFETCH_ENABLED=true
FIDES_PRIVACY_CENTER__IS_GEOLOCATION_ENABLED=true
FIDES_PRIVACY_CENTER__GEOLOCATION_API_URL=https://cdn-api.ethyca.com/location
FIDES_PRIVACY_CENTER__TCF_ENABLED=false
FIDES_PRIVACY_CENTER__PRIVACY_CENTER_URL=http://localhost:3000

• Nav to http://localhost:3000/fides-js-demo.html
• Confirm that Consent Experience section of the page is populated. This means pre-fetch worked.
• Confirm that banner shows up
• Make a consent selection
• Reload page
• Confirm banner does NOT show up again

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
• For API changes, the Postman collection has been updated

[cypress]

Passing run #3875 ↗︎

0	4	0	0	0
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Details:

Merge 3bbc45f into 194005a...
Project: fides	Commit: c71bb791db ℹ️
Status: Passed	Duration: 01:06 💡
Started: Aug 31, 2023 9:42 PM	Ended: Aug 31, 2023 9:43 PM

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

[SteveDMurphy]

Easy to follow the path of the cookie loading for any existing consent, thanks for burning through this @eastandwestwind !!

Approving knowing tests are being worked on but looks good and the videos were really helpful as well

[NevilleS]

Some questions and nits, as per usual from yours truly :)

[NevilleS]

One more comment, I'm willing to negotiate as well 😄

[NevilleS]

Thanks, ship it!