Move all Package & Container Registry settings to new settings page

Context

When you navigate to your Group's settings, you can find settings for Packages & Registries, where you can control settings like allowing or disallowing duplicate Maven uploads. But, when you navigate to your Project's settings, the Packages & Registries settings are under Ci/CD. This is confusing.

Proposal

Move all settings related to the Package stage under their own sub-heading called Packages & Registries. This change will align the Group and Project settings user experience and make it easier for folks to configure their registries.

This means moving the Cleanup policies for tags from CI/CD settings into Packages & Registries.

Testing

⚠ We may need to refactor tests at the end-to-end level to use the correct UI flow, especially for the Maven test that uses the setting for duplicate packages