linstor-volume-plugin: Only create diskless assignments on nodes (#5661)

With diskful set to true, linstor will fail if it cannot create local
storage for the resource. Which in turn will make it impossible to have a
setup with just compute nodes on cloudstack.

Author: rp-

Diff for: plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/storage/LinstorStorageAdaptor.java

@@ -258,7 +258,6 @@ public boolean connectPhysicalDisk(String volumePath, KVMStoragePool pool, Map<S
             final String rscName = getLinstorRscName(volumePath);
 
             ResourceMakeAvailable rma = new ResourceMakeAvailable();
-            rma.setDiskful(true);
             ApiCallRcList answers = api.resourceMakeAvailableOnNode(rscName, localNodeName, rma);
             checkLinstorAnswersThrow(answers);