Resolve "Consolidate Merge Request Widget Report Issue Bodies"
What does this MR do?
This is an implementation for #207243 (closed).
We currently use three slightly different components for rendering the title in a Merge Request Vulnerability Finding, due to us now utilizing the parsed backend reports and the unified Vulnerability schema there is need for simplification.
This refactor tries to unify all the Vulnerability reports to use same component to display their Issue title and Severity.