ActorLeakSpec fail fix (#30645)

* Wait for a specific association to be lost instead of any association #30639

* Formatting

akka-remote/src/test/scala/akka/remote/classic/ActorsLeakSpec.scala

@@ -21,6 +21,7 @@ import akka.testkit.TestActors.EchoActor
 object ActorsLeakSpec {
 
   val config = ConfigFactory.parseString("""
+       akka.loggers = ["akka.testkit.SilenceAllTestEventListener"]
        akka.actor.provider = remote
        akka.remote.artery.enabled = false
        akka.remote.classic.netty.tcp.applied-adapters = ["trttl"]
@@ -174,9 +175,11 @@ class ActorsLeakSpec extends AkkaSpec(ActorsLeakSpec.config) with ImplicitSender
           remoteSystem.terminate()
         }
 
-        EventFilter.warning(pattern = "Association with remote system", occurrences = 1).intercept {
-          Await.result(remoteSystem.whenTerminated, 10.seconds)
-        }
+        EventFilter
+          .warning(start = s"Association with remote system [${remoteAddress}] has failed", occurrences = 1)
+          .intercept {
+            Await.result(remoteSystem.whenTerminated, 10.seconds)
+          }
       }
 
       // Remote idle for too long case