Update the UI for the package registry list

What does this MR do?

This MR contains the frontend changes for #197923 (closed). Specifically, it:

• removes the old table based list
• adds a new PackagesListRow component that is used to display each package
• includes logic for displaying pipeline / user information for each package
• supports mobile sizes
• works on both the projects and group packages list pages

Screenshots

Note: The delete button in these screenshots is using the GlNewButton, which had some styling issues. This has been resolved in gitlab-ui!1275 (merged) but the GitLab UI version hasn't been updated in GitLab yet. When it is, the button should look correct. This seems to be resolved now.

Projects

Desktop	Mobile

Groups

Desktop	Mobile

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