This commit adds support for LUKS2 behind a new `partition.conf` key:
`luksGeneration`.
A bit of context, LUKS2 is the default encryption operating mode since
cryptsetup >= 2.1.0 (See [Arch
wiki](https://wiki.archlinux.org/title/dm-crypt/Device_encryption#Encryption_options_with_dm-crypt).
It is considered more secured and allows additional extensions. It also
comes with Argon2id as the default Password Based Key Derivation
Function (`--pbkdf` option). So it's important to provide this as an
option for Calamares in order to make Linux installs more secure, for
those who wish to encrypt their system.
This commit was tested on a custom Manjaro installer with:
- grub bootloader with the [argon patches](https://aur.archlinux.org/packages/grub-improved-luks2-git).
- [rEFInd](https://wiki.archlinux.org/title/REFInd) bootloader with
unencrypted `/boot` partition because rEFInd [doesn't support booting
from an encrypted volume](https://sourceforge.net/p/refind/discussion/general/thread/400418ac/)
**Important consideration for distribution maintainers**:
- You need to have compile flag `WITH_KPMCORE4API` on
- If you are shipping with grub by default please note that you need to
ship it with the Argon patches. Example on Arch Linux: [grub-improved-luks2-git](https://aur.archlinux.org/packages/grub-improved-luks2-git)
- If `luksGeneration` is not found in partition.conf, it will default to
luks1
- Please test this on your own distribution as this was only tested on
Manjaro installer (see above).
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