Test Dependency Scanning v2

This MR tests the Dependency Scanning template v2.

Changes

• Updated .gitlab-ci.yml to use the new v2 template
• New template URL: https://gitlab.com/gitlab-org/gitlab/-/raw/c314dae3755447a27a783aad2df04c748fd9a8f2/lib/gitlab/ci/templates/Jobs/Dependency-Scanning.v2.gitlab-ci.yml

Context

This is part of the migration effort described in gitlab-org/gitlab!201175 (merged)

Why this change?

The v2 template provides improved security scanning capabilities and better performance.

Testing

Please review the changes and ensure your CI pipeline continues to work as expected.