Package project settings side-by-side layout

Context

This issue is part of the epic: Update Package settings to side-by-side layout (&8134 - closed) which aims to improve usability of settings by changing the layout of settings.

This issue will likely need to be completed at the same time as Move container registry cleanup policies to a s... (#363426 - closed)

Implementation plan

• Update packages_and_registries project settings to use SettingsBlock

Designs

• in design management 🔻
• Figma