Get the scanned resources for a Pipeline as a CSV

What does this MR do?

To allow users to see all the URLs scanned by DAST, the MR provides an endpoint to that they might download the full list of URLs in CSV format.

An example CSV file would be:

Method,Scheme,Host,Port,Path,Query String
GET,http,railsgoat,3001,"",
GET,http,railsgoat,3001,/,
GET,http,railsgoat,3001,/assets/application.debug-999ac41d3f4b6736d79b1c8d363b4e2e1e2263ef2217c0a7b98321bd7c78e2b3.js,
GET,http,railsgoat,3001,/assets/application.debug-c6dcdc4b7eb60f590d2db194541c994d0e00b6264df5ccaf7a41926b9954613c.css,
GET,http,railsgoat,3001,/assets/validation.debug-732d56f958eff9a7b1494ef48972d7c251561dc77442c07767dbbb5a4750969c.js,
GET,http,railsgoat,3001,/forgot_password,

This MR relates to #223673 (closed)

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team