Update design of the pipeline graph

What does this MR do and why?

This change updates the design of the pipeline graph by enabling the new_pipeline_graph feature flag.

This redesign of the pipeline uses GlCard to simplify the view and add some mobile layout improvements.

Changelog: changed

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.

Screenshots or screen recordings

Before	After

👉 See more about this change at !132462 (merged)

How to set up and validate locally

This feature is already available in production, you can visit the pipeline pages at https://gitlab.com/gitlab-org/gitlab/-/pipelines.

Related to #426902