Remove input-icon-wrapper and input-icon-right classes and styles

What does this MR do and why?

Remove input-icon-wrapper and input-icon-right classes and styles. The color property does nothing here as GlButton styles have higher specificity. The rest of the properties can be replaced with Tailwind classes in the single usage of these classes password_field.vue

References

Please include cross links to any resources that are relevant to this MR. This will give reviewers and future readers helpful context to give an efficient review of the changes introduced.

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Before	After

How to set up and validate locally

• Go to https://gdk.test:3443/users/sign_in
• Password field icon button should be positioned correctly and inherit styles from GlButton