VMware: do create VMDK for new VMs (#51753)

While creating new VM, don't assume the VMDKs are present,
create them as we attache the disk to VM.

Possible regression fix for introduced via #45953

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>

lib/ansible/modules/cloud/vmware/vmware_guest.py

@@ -1810,7 +1810,8 @@ class PyVmomiHelper(PyVmomi):
             if 'filename' in expected_disk_spec and expected_disk_spec['filename'] is not None:
                 self.add_existing_vmdk(vm_obj, expected_disk_spec, diskspec, scsi_ctl)
                 continue
-            else:
+            elif vm_obj is None:
+                # We are creating new VM
                 diskspec.fileOperation = vim.vm.device.VirtualDeviceSpec.FileOperation.create
 
             # which datastore?