Move fully or partially away from snapshots in security dashboard integration test

The following discussion from !199755 (merged) should be addressed:

• @dpisek started a discussion: (+1 comment)

  thought: Maybe instead of using snapshot-tests across the whole file, we could limit them and use something like expect(root.querySelector('[data-testid="group-security-dashboard-new"]')).toBeDefined(); (and related query selectors for the new dashboard) in other places?

  Or perhaps even move away from snapshots?

  I found them to be not a 100% useful while iterating over the new dashboard, as they need to get updated whenever we change the dashboard component or add panels, etc.

  But happy to at least have a couple of snapshot tests if you feel that they provide another layer of safety 👍

  Having said that, this is not blocking, and we can tackle it in a follow-up!