chore: update setting page styling for API

[timarney]

Summary | Résumé

• Change the order of radios to email, download, API
  Fixes Consider moving email delivery to first radio option as it's for simpler use cases [API v2 QA] #4731

• Have the download radio selected after deletion to make it clear that this is now the default

Fixes #4724

revert-to-download.mp4

• Make the info banner at the top of the page match the style of the delete API key one.

• Add a mb-20 between each section to visually separate them a bit more.

👉 Note -- 20 was too much using 10

• The sub text on the API radio is a different size - It should probably have the same classes as the highlighted span

Fixes #4737

• Place the API key ID tool tip after "API key ID" rather than the number itself.

[github-actions]

🧪 Review environment

https://yxbnklk3vzozhmcakexjtilupq0hntwf.lambda-url.ca-central-1.on.aws/

[anikbrazeau]

LGTM on Design QA! :D Thanks Tim!

[thiessenp-cds]

LGTM :)