Remove actions buttons if theres no designs

What does this MR do?

Removes the action buttons (design destroyer, add designs) from the latest version if there are no designs. These buttons don't make sense to show if there's no designs.

Before	After

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

To reproduce:

• Upload a design
• Delete that design
• In the current version, there will be no designs, but the buttons will show.
• Upload another design to confirm that the buttons show up when hasDesigns in true.

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers

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

cc @cdybenko