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>

src/server/mod.rs

@@ -7,7 +7,7 @@
 use anyhow::Error;
 use serde_json::Value;
 
-use proxmox::tools::fs::{create_path, CreateOptions};
+use proxmox_sys::fs::{create_path, CreateOptions};
 
 use pbs_buildcfg;