[improve](backup) Add config ignore_backup_tmp_partitions #45240 (#45331)

cherry pick from #45240

fe/fe-common/src/main/java/org/apache/doris/common/Config.java

@@ -1589,6 +1589,15 @@ public class Config extends ConfigBase {
     @ConfField(mutable = true, masterOnly = true)
     public static boolean ignore_backup_not_support_table_type = false;
 
+    /**
+     * whether to ignore temp partitions when backup, and not report exception.
+     */
+    @ConfField(mutable = true, masterOnly = true, description = {
+        "是否忽略备份临时分区，不报异常",
+        "Whether to ignore temp partitions when backup, and not report exception."
+    })
+    public static boolean ignore_backup_tmp_partitions = false;
+
     /**
      * A internal config, to control the update interval of backup handler. Only used to speed up tests.
      */