Add admin setting and premium feature for CI/CD Catalog restriction

What does this MR do and why?

Add admin setting and premium feature for CI/CD Catalog restriction

This change prepares for the CI/CD Catalog publishing allowlist feature.

• Introducing ci_cd_catalog_projects_allowlist as an application setting in EE under ci_cd_settings column.
• Introducing ci_cd_catalog_publish_restriction feature for premium.

The feature will be introduced in the next MR that allows administrators of self-managed and GitLab Dedicated instances to restrict which projects can publish components to the CI/CD Catalog.

References

Related to #582044 (closed)

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