Remove x axis padding on package row component

What does this MR do and why?

This MR removes the x padding from the shared component list_item used in all the registries

Screenshots or screen recordings

Package Registry	Container Registry	Infrastructure Registry	Dependency Proxy	Package Other Version	Container registry details

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #342490 (closed)