Change the vulnerability description from haml to a Vue component

What does this MR do?

Currently on the standalone vulnerability page, the header and footer are Vue apps, but there is content in between them generated by haml:

The goal is to convert the entire page into one Vue app, and in order to do so, the haml content needs to be converted into a Vue component. This MR is an intermediate step that converts the haml into its own Vue app.

How to test locally

https://gitlab.com/snippets/1956676

Screenshots

Before	After (looks exactly the same, but is now a Vue app)

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