Align the visual presentation of the action between groups and projects

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What does this MR do and why?

As for to date the deletion message texts, titles, and styling are a bit different between groups and projects.

The purpose of this MR is to align the visual presentation.

Closes: #397033

Screenshots or screen recordings

Before	After
Group deletion (free tier) Group deletion (paid tier) 1 step Group deletion (paid tier) 2 step Project deletion (free tier) Project deletion (paid tier) 1 step Project deletion (paid tier) 2 step	Group deletion (free tier) Group deletion (paid tier) 1 step Group deletion (paid tier) 2 step Project deletion (free tier) Project deletion (paid tier) 1 step Project deletion (paid tier) 2 step

How to set up and validate locally

1. Run gdk.
2. Choose a group/project you want to delete.
3. Navigate to the group/project Settings > General.
4. Scroll down to the Advanced section and find the delete group/project block.
5. Observe delete block message, styling, title, and button text.

To verify the 2 steps deletion process:

1. Add a GitLab license in the Admin area (in case of gdk).
2. Do all the steps described above.
3. Click the Delete group/project button.
4. After the page is refreshed, navigate to the group/project Settings > General again.
5. Observe delete block message, styling, title, and button text.