Experiment: Pipelines Empty State Runner Templates [RUN ALL RSPEC] [RUN AS-IF-FOSS]

What does this MR do?

Issue: gitlab-org/growth/team-tasks#319 (closed)

Design issue: gitlab-org/growth/product#1674 (closed)

Tracking issue: #326725 (closed)

This is an experiment to test whether runner templates are driving CI usage or not.

How to test locally

Note: There might be a bit of a caching issue with feature flags & experiments.

• Checkout branch
  • git fetch origin pipelines-empty-state-runners-template
  • git checkout pipelines-empty-state-runners-template
• echo 'Feature.enable(:ci_runner_templates)' | bin/rails c
• Create or go to an empty project
• Disable "Default to Auto DevOps pipeline" in the CI/CD settings of the project (http://localhost:3000/<group_name>/<project_name>/-/settings/ci_cd
• Go to CI/CD -> Pipelines (http://localhost:3000/<group_name>/<project_name>/-/pipelines)

Screenshots

control	candidate

A quick demo of this experiment can be seen on slack (internal only) here.