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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
```
state: "present"
    keyfile: "/vault/keyfile"
- name: (create and) open the LUKS container; name it "mycrypt"
  luks_device:
    device: "/dev/loop0"
    state: "opened"
    name: "mycrypt"
    keyfile: "/vault/keyfile"
- name: close the existing LUKS container "mycrypt"
  luks_device:
    state: "closed"
    name: "mycrypt"
- name: make sure LUKS container exists and is closed
  luks_device:
    device: "/dev/loop0"
    state: "closed"
    keyfile: "/vault/keyfile"
- name: create container if it does not exist and add new key to it
  luks_device:
    device: "/dev/loop0"
    state: "present"
    keyfile: "/vault/keyfile"
    new_keyfile: "/vault/keyfile2"
- name: add new key to the LUKS container (container has to exist)
  luks_device:
    device: "/dev/loop0"
    keyfile: "/vault/keyfile"
    new_keyfile: "/vault/keyfile2"
- name: remove existing key from the LUKS container
  luks_device: