Tip: Use CSS-in-JS

[sarayourfriend]

Description

This PR updates the Tip component to use CSS-in-JS similar to how newer components do like the AnglePickerControl and Text.

How has this been tested?

I've confirmed there are no visual or behavioral differences between this branch and upstream in storybook.

Screenshots

Before:

After:

Types of changes

Non-breaking style change. The classname is preserved so it is still possible to target the components-tip class.

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR.

[sarayourfriend]

Closing in favor of #26366