##### SUMMARY
When running `ansible-test sanity --test validate-modules` on a PowerShell module in a collection it will fail to import any module util that is in Ansible itself. This causes issues if it requires access to those utils to build the arg spec as we can see with https://app.shippable.com/github/ansible-collections/ansible.windows/runs/16/5/console.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
ansible-test validate-modules

##### ANSIBLE VERSION
```paste below
devel
```

##### CONFIGURATION
N/A

##### OS / ENVIRONMENT
N/A - ansible-test against a collection
name = to_text(name)
        if name in self.exec_scripts.keys():
            return
        data = pkgutil.get_data("ansible.executor.powershell", name + ".ps1")
        if data is None:
            raise AnsibleError("Could not find executor powershell script "
                               "for '%s'" % name)
        b_data = to_bytes(data)
        
        if C.DEFAULT_DEBUG:
            exec_script = b_data
        else:
            exec_script = _strip_comments(b_data)
        self.exec_scripts[name] = to_bytes(exec_script)
        self.scan_module(b_data, wrapper=True, powershell=True)
    def _add_module(self, name, wrapper=False):