osbuild(container-deploy): make ContainerDeployOptions.Exclude "omite…

…mpty"

The osbuild stage will fail if we pass `None` here.

pkg/osbuild/container_deploy_stage.go

@@ -9,7 +9,7 @@ type ContainerDeployInputs struct {
 func (ContainerDeployInputs) isStageInputs() {}
 
 type ContainerDeployOptions struct {
-	Exclude []string `json:"exclude"`
+	Exclude []string `json:"exclude,omitempty"`
 }
 
 func (ContainerDeployOptions) isStageOptions() {}