build: use legacy builder for wcow if not opt-in with a builder component
build: use legacy builder for wcow if not opt-in with a builder component

Signed-off-by: CrazyMax <2eb8101acbc78c0d8bc50c0413737c84f1fc3bdc@users.noreply.github.com>

docker/cli,cpuguy83/cli,thaJeztah/cli,cpuguy83/cli,thaJeztah/cli,docker/cli