<!--- Verify first that your feature was not already discussed on GitHub -->
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##### 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
```
device: "/dev/loop0"
    remove_keyfile: "/vault/keyfile2"
- name: completely remove the LUKS container and its contents
  luks_device:
    device: "/dev/loop0"
    state: "absent"
- name: create a container with label
  luks_device:
    device: "/dev/loop0"
    state: "present"
    keyfile: "/vault/keyfile"
    label: personalLabelName
- name: open the LUKS container based on label without device; name it "mycrypt"
  luks_device:
    label: "personalLabelName"
    state: "opened"
    name: "mycrypt"
    keyfile: "/vault/keyfile"
- name: close container based on UUID
  luks_device:
    uuid: 03ecd578-fad4-4e6c-9348-842e3e8fa340
    state: "closed"
    name: "mycrypt"
'''
RETURN = '''
name:
    description:
        When I(state=opened) returns (generated or given) name
        of LUKS container. Returns None if no name is supplied.
    returned: success