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/node/tasks.rs

@@ -4,7 +4,7 @@ use std::io::{BufRead, BufReader};
 use anyhow::{bail, Error};
 use serde_json::{json, Value};
 
-use proxmox::{identity, sortable};
+use proxmox_sys::{identity, sortable};
 use proxmox_router::{list_subdirs_api_method, Router, RpcEnvironment, Permission, SubdirMap};
 use proxmox_schema::api;