Simplify vulnerability count list GraphQL query variables

What does this MR do?

On the vulnerability report, there is a VulnerabilityCountList component that shows the vulnerability counts:

This MR simplifies the GraphQL query variables by using provide/inject instead of a prop, and removes a duplicate lookup object. See comments for more details.

Does this MR meet the acceptance criteria?

Conformity

• 📋 Does this MR need a changelog?
  • I have included a changelog entry.
  • I have not included a changelog entry because this is a refactor.
• [-] 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
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Related to #284471 (closed)