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>

proxmox-rrd/tests/file_format_test.rs

@@ -4,7 +4,7 @@ use std::process::Command;
 use anyhow::{bail, Error};
 
 use proxmox_rrd::rrd::RRD;
-use proxmox::tools::fs::CreateOptions;
+use proxmox_sys::fs::CreateOptions;
 
 fn compare_file(fn1: &str, fn2: &str) -> Result<(), Error> {