[fix](Nereids) fix QueryProcessor cannot be cast to class LoadProcess…

…or (#43763)

fix QueryProcessor cannot be cast to class LoadProcessor, introduced by
#41730

Problem Summary:

sql: any select statement

it only meet when open debug log, so I can not write a test
```
2024-11-12 08:15:52,266 WARN (mysql-nio-pool-0|206) [ConnectProcessor.handleQueryException():480] Process one query failed because unknown reason: 
java.lang.ClassCastException: class org.apache.doris.qe.runtime.QueryProcessor cannot be cast to class org.apache.doris.qe.runtime.LoadProcessor (org.apache.doris.qe.runtime.QueryProcessor and org.apache.doris.qe.runtime.LoadProcessor are in unnamed module of loader 'app')
	at org.apache.doris.qe.CoordinatorContext.asLoadProcessor(CoordinatorContext.java:262) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.NereidsCoordinator.getJobId(NereidsCoordinator.java:202) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.QeProcessorImpl.registerQuery(QeProcessorImpl.java:116) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.StmtExecutor.executeAndSendResult(StmtExecutor.java:1925) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.StmtExecutor.handleQueryStmt(StmtExecutor.java:1897) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.StmtExecutor.handleQueryWithRetry(StmtExecutor.java:901) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.StmtExecutor.executeByNereids(StmtExecutor.java:833) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.StmtExecutor.execute(StmtExecutor.java:605) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.StmtExecutor.queryRetry(StmtExecutor.java:568) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.StmtExecutor.execute(StmtExecutor.java:558) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.ConnectProcessor.executeQuery(ConnectProcessor.java:340) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.ConnectProcessor.handleQuery(ConnectProcessor.java:243) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.MysqlConnectProcessor.handleQuery(MysqlConnectProcessor.java:209) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.MysqlConnectProcessor.dispatch(MysqlConnectProcessor.java:237) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.qe.MysqlConnectProcessor.processOnce(MysqlConnectProcessor.java:414) ~[doris-fe.jar:1.2-SNAPSHOT]
	at org.apache.doris.mysql.ReadListener.lambda$handleEvent$0(ReadListener.java:52) ~[doris-fe.jar:1.2-SNAPSHOT]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
	at java.lang.Thread.run(Thread.java:840) ~[?:?] 
```

fe/fe-core/src/main/java/org/apache/doris/qe/NereidsCoordinator.java

@@ -199,7 +199,11 @@ public long getNumReceivedRows() {
 
     @Override
     public long getJobId() {
-        return coordinatorContext.asLoadProcessor().jobId;
+        JobProcessor jobProcessor = coordinatorContext.getJobProcessor();
+        if (jobProcessor instanceof LoadProcessor) {
+            return ((LoadProcessor) jobProcessor).jobId;
+        }
+        return -1L;
     }
 
     /*