Smooth page loading on pipeline (header)

Summary

Page loading on pipeline detail is too slow. Especially header is too redundant, so there is a room to improve it.

Steps to reproduce

(How one can reproduce the issue - this is very important)

Example Project

https://gitlab.com/gitlab-org/gitlab/pipelines/114826365

What is the current bug behavior?

What is the expected correct behavior?

Output of checks

This bug happens on GitLab.com (13.8 through (at least) 14.2).