"Pipeline running in 0 seconds" for running pipelines

TODO

Don't show duration if it does not exist

Summary

It always says

Pipeline running in 0 seconds

on the commit page when a pipeline is running.

Steps to reproduce

1. Run a pipeline.
2. Go to the pipeline's commit page.
3. See the message.

What is the current bug behavior?

It says

Pipeline running in 0 seconds

What is the expected correct behavior?

It should say the actual running time.

Relevant logs and/or screenshots

Output of checks

This bug happens on GitLab.com