Generate design token output

Add label design tokens to GlLabel

feat(DesignTokens): add label design tokens

Closes #2613

See merge request !4279



Merged-by: Paul Gascou-Vaillancourt <pgascouvaillancourt@gitlab.com>
Approved-by: Dan MH <dmizzi-harris@gitlab.com>
Approved-by: Thomas Hutterer <thutterer@gitlab.com>
Approved-by: Paul Gascou-Vaillancourt <pgascouvaillancourt@gitlab.com>
Reviewed-by: Thomas Hutterer <thutterer@gitlab.com>
Reviewed-by: Scott de Jonge <sdejonge@gitlab.com>
Co-authored-by: sdejonge <sdejonge@gitlab.com>

# [86.4.0](v86.3.1...v86.4.0) (2024-07-09)

### Features

* **DesignTokens:** add label design tokens ([0e1c838e](0e1c838e))
* **GlLabel:** add label design tokens to GlLabel ([dbf33692](dbf33692))