I try to summarize. You need to migrate a Host from a Cluster (where the GI is enabled) on a new cluster where the VM GI is not enabled. Correct?
If so, the simplest way (for me is) is to remove the Host from the current cluster (delete the Service VM GI), then add the host into the new one and enable the GI (from NSX GUI) on the new cluster so that the GI is deployed on this new Cluster (if wasn't ).
You cannot migrate a Service VM (SVM) using vMotion/SvMotion. SVMs must remain on the host on which they were deployed for correct operation.
more info --> Install Guest Introspection on Host Clusters
I hope I was helpful.