[E2E] PROMOTE TO BLOCKING: security_reports_spec.rb

What does this MR do?

Promotes the following e2e tests to the blocking bucket:

1. Govern Security Reports for dependency scanning displays the Dependency List | Testcase | Spec metrics

2. Govern Security Reports displays security reports in the project security dashboard | Testcase | Spec metrics

3. Govern Security Reports displays security reports in the pipeline | Testcase | Spec metrics

This MR was created based on data from reliable e2e test report: #497971 (closed)

(This MR was automatically generated by gitlab_quality-test_tooling at 2024-10-07 02:06:14 UTC)