[CELEBORN-1571] Fix flaky test - pushdata timeout will add to pushExc…

…ludedWorker

### What changes were proposed in this pull request?

### Why are the changes needed?

Because the worker port is in use, the driver's worker status may change from shutdown status to unknown, causing the test to fail.

https://github.com/apache/celeborn/actions/runs/10465286274/job/28980278764
```java
- celeborn spark integration test - pushdata timeout will add to pushExcludedWorkers *** FAILED ***
  WORKER_UNKNOWN did not equal PUSH_DATA_TIMEOUT_PRIMARY, and WORKER_UNKNOWN did not equal PUSH_DATA_TIMEOUT_REPLICA (PushDataTimeoutTest.scala:150)
```

unit-tests.log
```
24/08/20 05:28:30,400 INFO [celeborn-dispatcher-7] Master: Receive ReportNodeFailure [
Host: localhost
RpcPort: 41487
PushPort: 34259
FetchPort: 45713
ReplicatePort: 35107
InternalPort: 41487

24/08/20 05:29:29,414 WARN [celeborn-client-lifecycle-manager-change-partition-executor-3] WorkerStatusTracker:
Reporting failed workers:
Host:localhost:RpcPort:42267:PushPort:43741:FetchPort:46483:ReplicatePort:43587   PUSH_DATA_TIMEOUT_PRIMARY   2024-08-19T22:29:29.414-0700
Current unknown workers:
Host:localhost:RpcPort:41487:PushPort:34259:FetchPort:45713:ReplicatePort:35107:InternalPort:41487   2024-08-19T22:29:29.108-0700
Current shutdown workers:
Host:localhost:RpcPort:41487:PushPort:34259:FetchPort:45713:ReplicatePort:35107:InternalPort:41487
```

### Does this PR introduce _any_ user-facing change?
No

### How was this patch tested?
GA

Closes apache#2697 from cxzl25/CELEBORN-1571.

Authored-by: sychen <[email protected]>
Signed-off-by: Shuang <[email protected]>

tests/spark-it/src/test/scala/org/apache/celeborn/tests/spark/PushDataTimeoutTest.scala

@@ -144,9 +144,12 @@ class PushDataTimeoutTest extends AnyFunSuite
       .getLifecycleManager
       .workerStatusTracker
       .excludedWorkers
+      .asScala.filter { case (_, (code, _)) =>
+        code != StatusCode.WORKER_UNKNOWN
+      }.toMap
 
-    assert(excludedWorkers.size() > 0)
-    excludedWorkers.asScala.foreach { case (_, (code, _)) =>
+    assert(excludedWorkers.size > 0)
+    excludedWorkers.foreach { case (_, (code, _)) =>
       assert(code == StatusCode.PUSH_DATA_TIMEOUT_PRIMARY ||
         code == StatusCode.PUSH_DATA_TIMEOUT_REPLICA)
     }