Feature/oc 13122 - NavTabs Design Tokens

[kukoc]

Checklist
(Check off all the items before submitting)

• Build process is done without errors and all tests pass in /lib directory.
• Self-reviewed the code prior to submitting.
• Meets accessibility standards.
• Added/updated documentation to /website as needed. -> Specs about NavTab tokens will be added in a separate Jira
• Added/updated tests as needed. -> Not needed

Purpose
Adding Design Tokens to the NavTabs Component implementation

[raquelarrojo]

I would also add tokens for icon in NavTabs component, as in Tabs component.
Now, there are no styles applied to the icon.

Notification badge should be aligned in row with the label.
Now:

Before: