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-rest-server/src/rest.rs

@@ -479,7 +479,7 @@ pub(crate) async fn handle_api_request<Env: RpcEnvironment, S: 'static + BuildHa
             resp.map(|body| {
                 Body::wrap_stream(DeflateEncoder::with_quality(
                     TryStreamExt::map_err(body, |err| {
-                        proxmox::io_format_err!("error during compression: {}", err)
+                        proxmox_sys::io_format_err!("error during compression: {}", err)
                     }),
                     Level::Default,
                 ))