As many pipelines inherit steps from `default_steps`, take out `e2e-firecracker-short` from `default_steps`. `e2e` pipeline only relies on `e2e-docker`. `integration` pipeline does full firecracker run with `e2e-firecracker`. `release` pipeline manually pulls in `e2e-firecracker-short` to be on the safe side. Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>