tape: cleanup - move tape file readers/writers into src/tape/file_formats folder

src/tape/drive/linux_tape.rs

@@ -40,15 +40,13 @@ use crate::{
         },
         file_formats::{
             PROXMOX_TAPE_BLOCK_SIZE,
+            PROXMOX_BACKUP_MEDIA_SET_LABEL_MAGIC_1_0,
             MediaSetLabel,
             MediaContentHeader,
-            PROXMOX_BACKUP_MEDIA_SET_LABEL_MAGIC_1_0,
-        },
-        helpers::{
             BlockedReader,
             BlockedWriter,
         },
-    }
+    },
 };
 
 fn run_sg_tape_cmd(subcmd: &str, args: &[&str], fd: RawFd) -> Result<String, Error> {

src/tape/drive/virtual_tape.rs

@@ -30,12 +30,12 @@ use crate::{
             MediaSetLabel,
             MediaContentHeader,
             PROXMOX_BACKUP_MEDIA_SET_LABEL_MAGIC_1_0,
+            BlockedReader,
+            BlockedWriter,
         },
         helpers::{
             EmulateTapeReader,
             EmulateTapeWriter,
-            BlockedReader,
-            BlockedWriter,
         },
     },
 };