Add report type & scanner name to security dashboards

What does this MR do?

This MR adds a new column to the security dashboard to show the report type of reported vulnerabilities. It adds the individual scanner name to the pipeline security tab that found the given vulnerability.

Background Context

Security integrators want to be able to show their scanner's name as part of security results, so it is clear that it was not a GitLab scanner that reported the results.

Users want to be able to understand what type of vulnerability result they are looking at when viewing the security dashboards.

Screenshots

Project Security dashboard

Group Security dashboard

Instance Security dashboard

Security Pipeline view

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• 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