Move API fuzzing download button in Pipeline page - Part 1 - Refactor Query fragment

Parent Issue: #333660 (closed)

• Refactor https://gitlab.com/gitlab-org/gitlab/-/blob/v14.0.0-ee/app/assets/javascripts/vue_shared/security_reports/queries/security_report_pipeline_download_paths.query.graphql into a query fragment.
• Update existing usages of query to use query fragment. Used Here: ee/app/assets/javascripts/vue_shared/security_reports/components/artifact_downloads/pipeline_artifact_download.vue
• Update unit tests