validate: launcher: Add a way to load pipeline tests from a scenario

3 jobs for json_defined_pipelines in 5 minutes and 38 seconds (queued for 1 second)
Status Name Job ID Coverage
  Preparation
passed manifest #49330

00:00:30

 
  Build
passed build fedora x86_64 #49331

00:01:56

 
  Full Builds
passed build android arm64 api28 #49332

00:03:11