Replace formation-override input styles with USWDS import

[jamigibbs]

Description

In Formation, base input styles were being imported directly from USWDS v1. We have temporarily ported those styles over to the CSS-Library in the /formation-overrides folder and now we would like it instead to be imported from the USWDS v3 module.

Tasks

• Check vets-website and content-build for usages of the input style classes
• Remove the /stylesheets/formation-overrides/elements/inputs.scss file.
• Import the USWDS inputs package (Discuss with the team about CSS-Library organization if necessary)
• Test the CSS-Library in vets-website to make sure that any remaining input styles still work and note if there are any visual changes between the v1 and v3 version.

Acceptance Criteria

• Any necessary input styles are being imported directly from the USWDS v3 package.

[danbrady]

Please validate that the issue mentioned in this slack convo is fixed when this ticket is complete.