Resolve "Fix spec violation for sidebar health status widget spec"

What does this MR do and why?

Remove the wrapper.vm usage and stub the required component

How to set up and validate locally

Running this spec should pass :

yarn jest ee/spec/frontend/sidebar/components/health_status/sidebar_health_status_widget_spec.js

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #413291 (closed)