ui: tape/Restore: let the user choose an owner

so that the tape backup can be restored as any user, given
the current logged in user has the correct permission.

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

src/bin/proxmox-tape.rs

@@ -27,6 +27,7 @@ use proxmox_backup::{
     api2::{
         self,
         types::{
+            Authid,
             DATASTORE_SCHEMA,
             DRIVE_NAME_SCHEMA,
             MEDIA_LABEL_SCHEMA,
@@ -868,6 +869,10 @@ async fn backup(mut param: Value) -> Result<(), Error> {
                 type: Userid,
                 optional: true,
             },
+            owner: {
+                type: Authid,
+                optional: true,
+            },
             "output-format": {
                 schema: OUTPUT_FORMAT,
                 optional: true,