fix: highlight error in red when form is submitted

[sumithmano]

If the checkbox is required by the form but is touched then upon submit validation error is displayed, but not highlighted in red color.

[fzaninotto]

I'm sorry, I don't understand the problem. Would you mind elaborating a bit, or even better, adding a screencast of what happens and what you'd like instead?

[sumithmano]

If CheckboxGroupInput is required in a form and submit form button is triggered without touching the component.
then the error helperText is not highlighted in error(red) color.

[fzaninotto]

Thanks for the description, now I understand better.

Your PR has linter warnings and misses a storybook to be able to test it. To push this fix forward, I opened a new PR #8652 with these changes. That PR supersedes yours.