Remove Vulnerability-Check approval rules frontend

What does this MR do and why?

Remove Vulnerability-Check approval rules from frontend.

Backend changes will be part of this MR Migration of persisted data will be part of this MR

Documentation related MR: !86782 (merged)

Related issue: #357300 (closed)

Screenshots or screen recordings

Existing Vulnerability-Check rules under project settings

New approval rules under project settings

MR related approval rules

How to set up and validate locally

1. Project -> Settings -> General -> Merge request approvals.

Expected that Vulnerability-Check rules won't be displayed unless existing.

2. Navigate into any merge request with an existing Vulnerability-Check

Expected that Vulnerability-Check rule won't have a tooltip with link

**For a creation of a Vulnerability-Check rule revert this code and follow step (1) above. Select all scanners and create a new MR with the addition of .gitlab-ci.yml with the following content:

include:
  - template: Security/Container-Scanning.gitlab-ci.yml
container_scanning:
  variables:
    DOCKER_IMAGE: python:3.4-alpine

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.