Restore bosh lite pipeline for ARI concourse

[Gerg]

The pipeline is currently running here: https://concourse.app-runtime-interfaces.ci.cloudfoundry.org/teams/capi-team/pipelines/bosh-lites

• Pipeline that provisions and manages a pool of cf-deployment bosh lite environments
• This pipeline previously existed, but was lost in the migration to the ARI concourse instance
• Some CAPI developers use these environments for development.
• The environments are now deployed in the common ARI GCP project
• Hopefully more developers will find these environments helpful!