Fix duplicate request on vulnerability report page load

What does this MR do?

We have 3 vulnerability report levels: project, group, and instance:

Project level	Group level	Instance level

On initial page load, the report will do a GraphQL request to get the vulnerabilities and vulnerability counts, then immediately do the same request again:

First request	Second request

This MR fixes it so that only one request is performed on page load, eliminating the duplicate second request.

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 while this is a bugfix, it's not a customer-facing one.
• [-] 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