Move badge settings to general settings

What does this MR do?

Move the project and group badge settings from own page to general settings page.

What are the relevant issue numbers?

closes https://gitlab.com/gitlab-org/gitlab-ce/issues/46590

Screenshots

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides