Add the ability to "inject" location into /fides.js bundles and cache responses for one hour

[NevilleS]

Closes #3170, plus unticketed work to support injecting location 👍

Code Changes

• Add cache-control headers to the /fides.js bundle to instruct browsers/CDNs to cache for ~1 hour
• Add /fides.js?location= query param to inject a given location to the bundle
• Add support for CloudFront location headers (e.g. CloudFront-Viewer-Country) to inject a given location to the bundle
• Include the injected location in the ETag for caching /fides.js bundle
• Add lots of tests

Steps to Confirm

• Run all Cypress tests
• Run nox -s "fides_env(test)", load the cookie house sample app, and confirm that /fides.js bundle is cached across page refreshes

Loom of some manual cache testing: https://www.loom.com/share/e840916e3c964b00b8d428a07492c9b4

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:
  • Create issue to add API documentation: Add developer documentation for how to use the Privacy Center's /fides.js API #3275
• Update CHANGELOG.md
• For API changes, the Postman collection has been updated

Description Of Changes

This adds an (important!) optimization to the /fides.js route that will enable HTTP clients/CDNs/etc. to cache the results, so we don't unnecessarily hammer the Privacy Center with requests. This part was fairly easy to do, but I realized while doing this that we should bake in support for generating different bundles for different locations as early as possible- since those cache semantics are kinda hard to reason about...

So this PR also proactively adds the ability to request a fides.js bundle with an explicit location, e.g.: https://localhost:3000/fides.js?location=US-CA

☝️ This will parse the query param out, and add a location property to the config object passed into the bundled initialization of Fides.js, ie. window.Fides.init({ consent, location })

This'll should enable us to set up test harnesses to exercise different locations without resorting to a lot of VPN chicanery 😄

[NevilleS]

I definitely didn't realize I had some mixing of fides.js builds from local branches! I think I fixed that now, but CI is still mysteriously cancelling/failing... hmm.

[cypress]

Passing run #1870 ↗︎

0	4	0	0	0
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Details:

Merge ba275da into c063274...
Project: fides	Commit: 0337ac0924 ℹ️
Status: Passed	Duration: 01:04 💡
Started: May 10, 2023 2:45 PM	Ended: May 10, 2023 2:46 PM

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[allisonking]

this is great, and thanks for all of the tests! 🎉

I left a few questions, but those are just to make sure I'm thinking about this the right way 👍