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##### SUMMARY

Two vmware modules uses `copy()` to duplicate an internal instance of a pyvmomi object. This to be able to modify the object during an iteration.

- https://github.com/ansible/ansible/blob/622a493ae03bd5e5cf517d336fc426e9d12208c7/lib/ansible/modules/cloud/vmware/vmware_guest.py#L788
- https://github.com/ansible/ansible/blob/622a493ae03bd5e5cf517d336fc426e9d12208c7/lib/ansible/modules/cloud/vmware/vmware_datastore_facts.py#L220

As explain here, https://github.com/ansible/ansible/pull/60196/files#r312643761 this is not the best approach and this may impact the performance.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME

vmware

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
devel
```
disk_index = 0
        for expected_disk_spec in self.params.get('disk'):
            disk_modified = False
            
            if vm_obj is not None and disks is not None and disk_index < len(disks):
                diskspec = vim.vm.device.VirtualDeviceSpec()
                
                diskspec.operation = vim.vm.device.VirtualDeviceSpec.Operation.edit
                diskspec.device = disks[disk_index]
            else:
                diskspec = self.device_helper.create_scsi_disk(scsi_ctl, disk_index)
                disk_modified = True
            
            disk_index += 1
            
            if disk_index == 7:
                disk_index += 1
            if 'disk_mode' in expected_disk_spec:
                disk_mode = expected_disk_spec.get('disk_mode', 'persistent').lower()
                valid_disk_mode = ['persistent', 'independent_persistent', 'independent_nonpersistent']
                if disk_mode not in valid_disk_mode:
                    self.module.fail_json(msg="disk_mode specified is not valid."
                                              " Should be one of ['%s']" % "', '".join(valid_disk_mode))
                if (vm_obj and diskspec.device.backing.diskMode != disk_mode) or (vm_obj is None):
                    diskspec.device.backing.diskMode = disk_mode
                    disk_modified = True
            else:
                diskspec.device.backing.diskMode = "persistent"
            
            if 'type' in expected_disk_spec: