move channel/stream helpers to pbs-tools

pbs_tools
  ::blocking: std/async wrapping with block_in_place
  ::stream: stream <-> AsyncRead/AsyncWrite wrapping

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

src/server/rest.rs

@@ -31,6 +31,7 @@ use proxmox::api::{
 use proxmox::http_err;
 
 use pbs_tools::compression::{DeflateEncoder, Level};
+use pbs_tools::stream::AsyncReaderStream;
 
 use super::auth::AuthError;
 use super::environment::RestEnvironment;
@@ -42,7 +43,6 @@ use crate::auth_helpers::*;
 use crate::config::cached_user_info::CachedUserInfo;
 use crate::tools;
 use crate::tools::compression::CompressionMethod;
-use crate::tools::AsyncReaderStream;
 use crate::tools::FileLogger;
 
 extern "C" {