Update scanner filter with Vendor name - Pipeline Security Tab

Proposal

This was split from #210327 (closed)

Update the Scanner filter on the vulnerability list to:

• show the scanner vendor alongside the scanner name
• dynamically add custom scanner filters that have been configured with the project and that filter for custom scanner vulnerabilities only

The equivalent changes are being made to the project-level security dashboard in this separate issue #229661 (closed)

Designs

See designs attached to #229661 (closed)

• #229661[Vendor-scanner-filters.png]
• #229661[design_1596018145997.png]

Documentation

The Pipeline screenshots will need to be updated: https://docs.gitlab.com/ee/user/application_security/security_dashboard/

Implementation Plan

• frontend On the pipeline details page's security tab, show custom security scanners
  • Show scanner vendor alongside name
  • Dynamically add custom scanner filters that have been configured with the project and that filter for custom scanner vulnerabilities only
  • It should look the same as the custom security scanners as #229661 (closed)