Update design of the pipeline graph

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

config/feature_flags/development/new_pipeline_graph.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/426902
 milestone: '16.5'
 type: development
 group: group::ux paper cuts
-default_enabled: false
+default_enabled: true