bug: UIKit Vitamin buttons dimensions are not exact compared to Figma

[daniel-dumortier]

Describe the bug

Button in UIKit implementation do not match the size of Buttons in Figma (see below).
It might be linked to wrong padding and insets.

New icon alone button are not concerned by this bug

Steps to reproduce

1. Go to UIKit part of Showcase
2. Click on "Buttons"
3. take a screenshot
4. overlay Figam buttons
5. See differences

Expected behavior

Button dimension should match exactly Figma button

Screenshots

Device (please complete the following information):

• Model: iPhone
• OS: iOS
• Version : N/A