stages code structure changed to match current pipeline syntax
stages code structure changed to match current pipeline syntax

Pipleine syntax changed and expects stage to be written
as block inside {}, deprecating previous style.
Also, workspace is cleaned as 1st stage, build dir
in workspace is always empty, so stop cleaning
it and showing that as (very short) build stage.

ostroproject/ostro-os-xt,ostroproject/ostro-os-xt,ostroproject/ostro-os-xt