Protected containers: Create protection rules in project settings

What does this MR do and why?

feat: Protected containers: Protection rules in project settings ui

• Adds frontend ui for the container protection rule in project settings
• Hide project setting for container protection rules when relevant feature flag is disabled
• Code mostly taken from Protected packages: Create package protection r... (!140473 - merged)

with at Siemens

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

MR Checklist (@gerardo-navarro)

• Changelog entry added, if necessary
• Documentation created/updated via this MR
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the javascript style guides
• Conforms to the database guides

Screenshots or screen recordings

Screencast: https://www.loom.com/share/8f1db270e25346b584fd0057ce1a554a

How to set up and validate locally

1. Enable Registry by editting config/gitlab.yml with the following setting

registry:
  enabled: true

2. Restart GDK, see also https://docs.gitlab.com/ee/administration/packages/container_registry.html#configure-container-registry-under-an-existing-gitlab-domain

gdk restart

3. In rails console enable the experiment fully

Feature.enable(:container_registry_protected_containers)

4. Go to http://gdk.test:3000/flightjs/Flight/-/settings/packages_and_registries
5. Start adding new container protection rules in the second half of the page and play around with the form

Related to #441345 (closed)