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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
```
property_info.value = property_spec.get('value', '')
                property_info.description = property_spec.get('description')
                new_vapp_property_spec.info = property_info
                new_vapp_property_spec.info.key = new_property_index
                new_property_index += 1
                is_property_changed = True
                if is_property_changed:
                    new_vmconfig_spec.property.append(new_vapp_property_spec)
        if new_vmconfig_spec.property:
            self.configspec.vAppConfig = new_vmconfig_spec
            self.change_detected = True
    def customize_customvalues(self, vm_obj):
        if len(self.params['customvalues']) == 0:
            return
        facts = self.gather_facts(vm_obj)
        for kv in self.params['customvalues']:
            if 'key' not in kv or 'value' not in kv:
                self.module.exit_json(msg="customvalues items required both 'key' and 'value' fields.")
            key_id = None
            for field in self.content.customFieldsManager.field:
                if field.name == kv['key']:
                    key_id = field.key
                    break
            if not key_id:
                self.module.fail_json(msg="Unable to find custom value key %s" % kv['key'])
            
            if kv['key'] not in facts['customvalues'] or facts['customvalues'][kv['key']] != kv['value']:
                self.content.customFieldsManager.SetField(entity=vm_obj, key=key_id, value=kv['value'])
                self.change_detected = True
    def customize_vm(self, vm_obj):