Enrich container scanning with more data on the frontend

What does this MR do?

This mirrors the backend implementation for https://gitlab.com/gitlab-org/gitlab-ee/issues/5528, which was done here: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9641. Biggest user facing changes:

• Slightly better handling in generation solutions, descriptions and titles
• Titles now show the affected packages
• Mapping clair severities to our severity scheme
• Showing the affected image name in the modal

Comment	Before	After
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Modal

What are the relevant issue numbers?

Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/5528

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated via this MR
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• EE specific content should be in the top level /ee folder
• For a paid feature, have we considered GitLab.com plans, how it works for groups, and is there a design for promoting it to users who aren't on the correct plan?
• Security reports checked/validated by reviewer

Closes #5528 (closed)