Improve svg import method in create namespace page

What does this MR do and why?

Part of #394859

Improve svg import method in create namespace page

This change improves the way we import the illustations in the project and group create pages.

Screenshots or screen recordings

Groups http://gdk.test:3000/groups/new	Projects http://gdk.test:3000/projects/new

How to set up and validate locally

Visit the create pages for projects and groups:

• http://gdk.test:3000/projects/new
• http://gdk.test:3000/groups/new

Select the options and confirm the images work correctly.

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.