Move Group Deploy Tokens to new Group-scoped Repository settings

What does this MR do?

Users have been complaining about the fact that we moved Project-scoped Deploy Tokens and Deploy Keys from the Repository settings page to the CI / CD settings page (more details in linked issue)

In !29184 (merged) and in !29280 (merged), we're moving Deploy Keys and Deploy Tokens back to the project Repository page.

To be consistent with this rollback, we need to have the Group-scoped Deploy Tokens moved from the current Group CI / CD page to a new Group Repository page. This is what this MR does.

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team

Relates to #212775 (closed)