src/api2.rs: move backup api to /backup

src/bin/dump-backup-api.rs

@@ -5,7 +5,7 @@ use proxmox_backup::api_schema::format::*;
 
 fn main() -> Result<(), Error> {
 
-    let api = api2::admin::datastore::backup::backup_api();
+    let api = api2::backup::backup_api();
 
     dump_api(&mut std::io::stdout(), &api, ".", 0)?;