Add a Secure Continuous Vulnerability Scanning E2E Spec

What does this MR do and why?

As per #462876 (closed)

Adds a spec to test Continuous Vulnerability Scanning

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

n/a

How to set up and validate locally

Needs to use the GitLab QA scenario from gitlab-qa!1361 (diffs)

1. Build QA image

gitlab % docker build -t gitlab/gitlab-ee-qa:cvstest --file ./qa/Dockerfile ./

2. Tag GitLab image from the latest pipeline of this MR eg.

docker pull --platform linux/x86_64 registry.gitlab.com/gitlab-org/build/omnibus-gitlab-mirror/gitlab-ee:<SHA>-ruby3.1.5
docker tag registry.gitlab.com/gitlab-org/build/omnibus-gitlab-mirror/gitlab-ee:<SHA>-ruby3.1.5 gitlab/gitlab-ee:cvstest

3. Run

gitlab-qa % CHROME_DISABLE_DEV_SHM=true QA_SKIP_PULL=TRUE ./exe/gitlab-qa Test::Integration::ContinuousVulnerabilityScanning gitlab/gitlab-ee:cvstest --no-teardown -- --tag orchestrated qa/specs/features/ee/browser_ui/13_secure/cvs_dependency_scanning_spec.rb