Update pipeline link and header

What does this MR do and why?

This MR updates the pipeline header so it does not show the commit name as prominently a before, to only use the pipeline name (from workflow:name) in the heading.

Change is behind the project FF ci_show_pipeline_name_instead_of_commit_title.

References

• Issue

Screenshots or screen recordings

before	after

My local bookmarks

• https://gdk.test:3000/gitlab-org/gitlab-test/-/pipelines/13
• https://gdk.test:3000/my-group/my-project/-/pipelines/1336
• https://gdk.test:3000/my-group/my-project/-/pipelines/1335

How to set up and validate locally

1. Visit a pipeline in My Project > Build > Pipelines
2. Check the header of the page
3. Enable the feature flag e.g https://gdk.test:3000/rails/features/
4. Refresh the pipeline page and check the header

Note: There are different kinds of pipelines you can set up:

1. Pipelines with a workflow:name should display the name, e.g https://docs.gitlab.com/ci/yaml/#workflowname
2. Pipelines without should only show the ID of the pipeline

MR acceptance checklist

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Related to #545098