[iec] Add Fuel uninstall script & build step

- add iec-fuel-destroy.sh, responsible for uninstalling Fuel resources
  from the jumpserver;
- move Compass uninstall step after usecase(s) step(s);
- rework `deploy_type` matrix to be installer-agnostic and introduce
  a new `installer` matrix;
- add blocking threshold for usecase(s) step(s) so destroy step is
  always performed;

Change-Id: Ifaba336e436131a8ac9e871e706c0b8234b617ed
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>