Migrate security-report-download-dropdown in security_reports_app.vue to use newer merge-request-artifact-download component Part 1

As a result of:

Issue	Description
#289952 (closed)	Creates MR Artifact Download Component
#328481 (closed)	Use MR Artifact Download component in Cov Fuzz and API Fuzz MR widgets
#328194 (closed)	Creates Pipeline Artifact Download Component
#328481 (closed)	Use Pipeline Artifact Component on Pipeline Security Tab

We should go back and update for CE - Community Edition for SAST.

The security-report-download-dropdown component has additional logic and a graphQL query that has already been wrapped in merge_request_artifact_download.vue. We should swap out these components in favor of the newer one.

Part	Issue	Description
1	#330429 (closed)	Move EE code to CE update existing usages <-- this one
2	#331025 (closed)	Swap out component for newer component

Part 1 Implementation Plan

• Move the contents of https://gitlab.com/gitlab-org/gitlab/-/tree/master/ee/app/assets/javascripts/vue_shared/security_reports/components/artifact_downloads into the CE directory
• Refactor imports and usages of merge_request_aritact_downloads.js and pipeline_artifact_downloads.vue to point to CE directory
• Achieve passing pipeline

Part 2

#331025 (closed)