<!--- 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
```
keyslot_count = 0
            keyslot_area = False
            keyslot_re = re.compile(r'^Key Slot [0-9]+: ENABLED')
            for line in result[STDOUT].splitlines():
                if line.startswith('Keyslots:'):
                    keyslot_area = True
                elif line.startswith('  '):
                    
                    
                    
                    if keyslot_area and line[2] in '0123456789':
                        keyslot_count += 1
                elif line.startswith('\t'):
                    pass
                elif keyslot_re.match(line):
                    
                    
                    keyslot_count += 1
                else:
                    keyslot_area = False
            if keyslot_count < 2:
                self._module.fail_json(msg="LUKS device %s has less than two active keyslots. "
                                           "To be able to remove a key, please set "
                                           "`force_remove_last_key` to `yes`." % device)
        result = self._run_command([self._cryptsetup_bin, 'luksRemoveKey', device,
                                    '-q', '--key-file', keyfile])
        if result[RETURN_CODE] != 0:
            raise ValueError('Error while removing LUKS key from %s: %s'
                             % (device, result[STDERR]))
class ConditionsHandler(Handler):