Event Landing View & Job List View - Visually differentiate virtual job from normal job

[sagar1312]

What happened:
Builds for virtual jobs are not executed in a event. In the UI, such builds are not easily distinguishable from non-virtual job builds.

What you expected to happen:

• Event landing view (V1 and V2)
  • Add a new icon “fast-forward“ for the virtual job in the workflow graph
• Job List View (V1 and V2)
  • Use the new icon “fast-forward“ for the virtual job under the first column representing the most recent build status
  • Add info in the job name tooltip to indicate if a job is virtual
• Pipeline Options View
  • Display the label “Virtual“ (with gray background) next to the job name to indicate when the job is virtual

How to reproduce it:
Sample pipeline https://cd.screwdriver.cd/pipelines/15482/events