add dockerEnabled option (#191)

Add dockerEnabled option for users who does not need docker and want not to run privileged container.
if `dockerEnabled == false`, dind container not run, and there are no privileged container.

Do the same as closed #96

api/v1alpha1/zz_generated.deepcopy.go

@@ -530,6 +530,11 @@ func (in *RunnerSpec) DeepCopyInto(out *RunnerSpec) {
 		*out = new(bool)
 		**out = **in
 	}
+	if in.DockerEnabled != nil {
+		in, out := &in.DockerEnabled, &out.DockerEnabled
+		*out = new(bool)
+		**out = **in
+	}
 }
 
 // DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new RunnerSpec.