Resolve brandable CSS TODOs: _ic-forms.scss
Resolve brandable CSS TODOs: _ic-forms.scss

Fixes: CNVS-38644

Test plan:

- Code reviewer: confirm Canvas CSS and assets compile
  ok.

- All reviewers:

  - Confirm that in normal contrast, the newer Canvas
    CSS form inputs have the following :focus state
    (see /styleguide):
    https://cl.ly/3B3j1I3M1I1H

  - Confirm that in HIGH contrast, the newer Canvas
    CSS form inputs have the following :focus state
    (see /styleguide):
    https://cl.ly/0a473P412824

Change-Id: Iaa791c20f71fa4ce2f7b8ffdcd4eac3665f71768
Reviewed-on: https://gerrit.instructure.com/122495
Tested-by: Jenkins
Reviewed-by: Pam Hiett <7b533437add1ce4ea4ed79979fa88e0e484e554b@instructure.com>
QA-Review: Dan Sasaki <ae19fabf7fe19dff310008c9b6a4d2ec84d311d8@instructure.com>
Product-Review: Pam Hiett <7b533437add1ce4ea4ed79979fa88e0e484e554b@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,sfu/canvas-lms