update to proxmox-sys 0.2 crate

- imported pbs-api-types/src/common_regex.rs from old proxmox crate
- use hex crate to generate/parse hex digest
- remove all reference to proxmox crate (use proxmox-sys and
  proxmox-serde instead)

Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>

pbs-tools/src/lib.rs

@@ -1,9 +1,7 @@
-pub mod acl;
 pub mod cert;
 pub mod cli;
 pub mod crypt_config;
 pub mod format;
-pub mod fs;
 pub mod io;
 pub mod json;
 pub mod lru_cache;
@@ -14,9 +12,5 @@ pub mod str;
 pub mod sync;
 pub mod sys;
 pub mod ticket;
-pub mod xattr;
 
 pub mod async_lru_cache;
-
-mod command;
-pub use command::{command_output, command_output_as_string, run_command};