Effectively removes support for the following hashing algorithms
as announced in the NixOS 22.11 release notes:
- bcrypt_x ($2x$)
- sha256crypt ($5$)
- sha1crypt ($sha1$)
- sunmd5 ($md5$)
- md5crypt ($1$)
- nt ($3$)
- bdiscrypt (_)
- bigcrypt (:)
- descrypt (:)
And exposes the crypt scheme ids for enabled algorithms, so they can be
reused for validation in the users-groups module.
4e300e071b