[fix](job) set cluster when routine load job replay from image (#59135)

### What problem does this PR solve?

routine load job pause and can not resume when update:
```
mysql> show routine load\G;
*************************** 1. row ***************************
                  Id: 1765800763597
                Name: lineitem_dup_persistent_label
          CreateTime: 2025-12-15 20:18:51
           PauseTime: 2025-12-15 20:33:34
             EndTime: NULL
              DbName: regression_test_stress_load_release_routine_load
           TableName: lineitem_dup_persistent
        IsMultiTable: false
               State: PAUSED
      DataSourceType: KAFKA
      CurrentTaskNum: 0
       JobProperties: {"max_batch_rows":"300000","timezone":"Asia/Shanghai","send_batch_parallelism":"1","load_to_single_tablet":"false","column_separator":"','","line_delimiter":"\n","delete":"*","current_concurrent_number":"96","partial_columns":"false","merge_type":"APPEND","exec_mem_limit":"2147483648","strict_mode":"false","jsonpaths":"","max_batch_interval":"20","max_batch_size":"209715200","fuzzy_parse":"false","escape":"0","enclose":"0","partitions":"*","columnToColumnExpr":"","whereExpr":"*","desired_concurrent_number":"256","precedingFilter":"*","format":"csv","max_error_number":"0","max_filter_ratio":"1.0","sequence_col":"*","json_root":"","strip_outer_array":"false","num_as_string":"false"}
DataSourceProperties: {"topic":"test-release-topic-persistent690131793","currentKafkaPartitions":"0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95","brokerList":"172.20.48.94:9092"}
    CustomProperties: {"kafka_default_offsets":"OFFSET_BEGINNING","group.id":"test-consumer-group","client.id":"test-client-id"}
           Statistic: {"receivedBytes":955557901,"runningTxns":[],"errorRows":0,"committedTaskNum":0,"loadedRows":5000000,"loadRowsRate":5657,"abortedTaskNum":0,"errorRowsAfterResumed":0,"totalRows":5000000,"unselectedRows":0,"receivedBytesRate":1081251,"taskExecuteTimeMs":883752}
            Progress: {"0":"50620","1":"55664","2":"51135","3":"52169","4":"55413","5":"55355","6":"50806","7":"52994","8":"51368","9":"50639","10":"52749","11":"54719","12":"51991","13":"52286","14":"53822","15":"52359","16":"50858","17":"55055","18":"52334","19":"54346","20":"48332","21":"53804","22":"50136","23":"52355","24":"50488","25":"53128","26":"53798","27":"54857","28":"54381","29":"51395","30":"53017","31":"51399","32":"49111","33":"51818","34":"52621","35":"52366","36":"51532","37":"54548","38":"53237","39":"54158","40":"48448","41":"48682","42":"48340","43":"53605","44":"50907","45":"58149","46":"52260","47":"55176","48":"51573","49":"52380","50":"52152","51":"52939","52":"52225","53":"52897","54":"51117","55":"53323","56":"51467","57":"51690","58":"52769","59":"50265","60":"54767","61":"54841","62":"50346","63":"48053","64":"56053","65":"53854","66":"54136","67":"48582","68":"53609","69":"50954","70":"55356","71":"51986","72":"45904","73":"50689","74":"57569","75":"49008","76":"51408","77":"50222","78":"50540","79":"55616","80":"50095","81":"52915","82":"49424","83":"50399","84":"49945","85":"50468","86":"49964","87":"50477","88":"50415","89":"54023","90":"49280","91":"49895","92":"51864","93":"48190","94":"53446","95":"52084"}
                 Lag: {"0":5671,"1":0,"2":0,"3":0,"4":0,"5":0,"6":0,"7":0,"8":0,"9":0,"10":0,"11":0,"12":0,"13":0,"14":0,"15":0,"16":0,"17":0,"18":0,"19":0,"20":0,"21":0,"22":0,"23":0,"24":0,"25":0,"26":0,"27":0,"28":0,"29":0,"30":0,"31":0,"32":0,"33":0,"34":0,"35":0,"36":0,"37":0,"38":0,"39":0,"40":0,"41":0,"42":0,"43":0,"44":0,"45":0,"46":0,"47":0,"48":0,"49":0,"50":0,"51":0,"52":0,"53":0,"54":0,"55":1,"56":0,"57":0,"58":0,"59":0,"60":0,"61":0,"62":0,"63":0,"64":0,"65":0,"66":0,"67":0,"68":0,"69":0,"70":0,"71":0,"72":0,"73":0,"74":0,"75":0,"76":0,"77":0,"78":0,"79":0,"80":0,"81":0,"82":0,"83":0,"84":0,"85":0,"86":0,"87":0,"88":0,"89":0,"90":0,"91":0,"92":0,"93":0,"94":0,"95":0}
ReasonOfStateChanged: ErrorReason{code=errCode = 103, msg='failed to allocate task: Cannot invoke "Object.hashCode()" because "key" is null'}
        ErrorLogUrls: 
            OtherMsg: failed to allocate task: Cannot invoke "Object.hashCode()" because "key" is null
                User: root
             Comment: 
1 row in set (0.01 sec)
```

introduced by #52911, root cause is
missing setting cluster when routine load job replay from image.

Author: sollhui

fe/fe-core/src/main/java/org/apache/doris/load/routineload/RoutineLoadManager.java

@@ -953,6 +953,9 @@ public void readFields(DataInput in) throws IOException {
             if (!routineLoadJob.getState().isFinalState()) {
                 Env.getCurrentGlobalTransactionMgr().getCallbackFactory().addCallback(routineLoadJob);
             }
+            if (Config.isCloudMode()) {
+                routineLoadJob.setCloudCluster();
+            }
         }
     }