<!--- Verify first that your feature was not already discussed on GitHub -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
<!--- Describe the new feature/improvement briefly below -->
Ansible by default only creates LUKS1 format devices. Considering LUKS2 extra features and age, I think it would be beneficial to allow users to create LUKS2 devices.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
luks_device

##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->
For reliability, one should use either disk UUID's or labels. UUID's are (in my opinion) a hassle when it comes to using them in Ansible.

Enter labels. Labels can be the same across multiple hosts, and will be tied to the right disk/partition, even if sda1 suddenly becomes sdb1 after some hardware reconfiguration.

Now, the LUKS1 format, which Ansible creates by default with the `luks_device` module, does not support labels... Support was added with LUKS2.

It should be noted that, from what I can see, the module *does already support removing keys from LUKS2 format devices*.

<!--- Paste example playbooks or commands between quotes below -->
```yaml
- name: create LUKS2 container
  luks_device:
    device: "/dev/loop0"
    state: "present"
    keyfile: "/vault/keyfile"
    format: luks2
```
def __init__(self, module, crypthandler):
        super(ConditionsHandler, self).__init__(module)
        self._crypthandler = crypthandler
        self.device = self.get_device_name()
    def get_device_name(self):
        device = self._module.params.get('device')
        label = self._module.params.get('label')
        uuid = self._module.params.get('uuid')
        name = self._module.params.get('name')
        if device is None and label is not None:
            device = self.get_device_by_label(label)
        elif device is None and uuid is not None:
            device = self.get_device_by_uuid(uuid)
        elif device is None and name is not None:
            device = self._crypthandler.get_container_device_by_name(name)
        return device
    def luks_create(self):