Allow connecting interactive console over a unix socket `picodata run
--console-sock`. Use `picodata connect --unix` to connect.

Previously picodata failed to drop spaces with grants on it ("the
space has grants"). Another problem was that we didn't clean
_pico_privileges grants when the space was dropped. Both problems
were fixed in the current commit.

The most obvious benefit is link checking. This is especially useful with rust-analyzer, because it allows to jump to definition of the item referenced in the doc comment.

The patch also makes CI to use `make lint` to avoid duplication.

The patch adds `password_min_length` parameter to `_pico_properties` space.
The parameter is taken into account in `pico.create_user` and 
`pico.change_password` lua functions.

1. Rebase on top of fresh 2.11.0-picodata branch (2.11.0-40-g8277665cf0)
2. Drop two commits related to cracklib vendoring. The original feature
   was abandoned so the cracklib isn't needed anymore.