Formation Deprecation - Utility Migration - Swap vets-website imports from formation to css-library

[micahchiang]

Description

With the completion of #2538, we're ready to attempt a swap of the css utility imports in vets-website from Formation to CSS Library.

Considerations

• Formation utilities directory
  • Formation utilities are all imported into core.scss. core.scss is imported into vets-website in style.scss
• css-library utilities directory
• Similar to how we conducted significant QA on #2494 and #2525, we'll want to manually test our imports through verdaccio
• Not sure if this has to be an all or nothing effort. We may be able to get away with swapping 1-2 imports first as a test run before doing the rest. Or we may be able to do something like a phased rollout where we give teams a lead time for each import replacement.

Tasks

• [ ] Submit a PR into vets-website that updates the CSS-Library dependency and changes the import paths in the above stylesheets from Formation to CSS Library

[caw310]

This is work that will unblock the node upgrade.