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/api2/access/mod.rs

@@ -6,7 +6,7 @@ use serde_json::{json, Value};
 use std::collections::HashMap;
 use std::collections::HashSet;
 
-use proxmox::{identity, sortable};
+use proxmox_sys::{identity, sortable};
 use proxmox_router::{
     http_err, list_subdirs_api_method, Router, RpcEnvironment, SubdirMap, Permission,
 };