Migrate GlDropdown to GlListbox in cluster_filter

What does this MR do and why?

Relates to #409695 (closed)

This MR is part of the migration effort epic &9371 to migrate GlDropdown to GlCollapsibleListbox.

Screenshots or screen recordings

Before	After

How to set up and validate locally

In general it should work just as before.

The cluster filter can be found on the operational tab of the project vulnerability report.

You could use the tweak devtool to modify the graphql response for clusters with following settings:

• url: http://gdk.test:3000/api/graphql (or similar based on your local instance url)
• method: POST
• response payload: response-payload.json
• request payload: request-payload.json

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.