[Feature Request] Allow `/healthz` endpoints to be accessible without admin UI

Describe the feature request

I would like to use the health check endpoint without enabling the rest of the admin UI.

Describe alternatives you've considered

No response

Affected area

• Docs
• Installation
• Performance and Scalability
• Security
• User Experience
• Test and Release
• Developer Infrastructure
• Client Plugin
• Server Plugin
• Extensions
• Others