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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
```
if host not in self.esx_hosts:
            self.esx_hosts[host] = self.find_obj(self.content, [vim.HostSystem], host)
        return self.esx_hosts[host]
    def get_parent_datacenter(self, obj):
        """ Walk the parent tree to find the objects datacenter """
        if isinstance(obj, vim.Datacenter):
            return obj
        if obj in self.parent_datacenters:
            return self.parent_datacenters[obj]
        datacenter = None
        while True:
            if not hasattr(obj, 'parent'):
                break
            obj = obj.parent
            if isinstance(obj, vim.Datacenter):
                datacenter = obj
                break
        self.parent_datacenters[obj] = datacenter
        return datacenter
class PyVmomiHelper(PyVmomi):
    def __init__(self, module):
        super(PyVmomiHelper, self).__init__(module)
        self.device_helper = PyVmomiDeviceHelper(self.module)
        self.configspec = None
        self.relospec = None
        self.change_detected = False  
        self.change_applied = False   
        self.customspec = None
        self.cache = PyVmomiCache(self.content, dc_name=self.params['datacenter'])
    def gather_facts(self, vm):