MINOR: Replace boundPort with brokerBoundPort (#20297)

## Changes:
- Replaced all references to boundPort with brokerBoundPort.

## Reasons
- boundPort and brokerBoundPort share the same definition and behavior.

Reviewers: TaiJuWu <tjwu1217@gmail.com>, Ken Huang <s7133700@gmail.com>,
 Chia-Ping Tsai <chia7712@gmail.com>

clients/clients-integration-tests/src/test/java/org/apache/kafka/clients/consumer/ConsumerBounceTest.java

@@ -380,7 +380,7 @@ public class ConsumerBounceTest {
         TestUtils.waitForCondition(() -> {
             FindCoordinatorResponse response = null;
             try {
-                response = IntegrationTestUtils.connectAndReceive(request, clusterInstance.boundPorts().get(0));
+                response = IntegrationTestUtils.connectAndReceive(request, clusterInstance.brokerBoundPorts().get(0));
             } catch (IOException e) {
                 return false;
             }

core/src/test/scala/unit/kafka/server/AbstractApiVersionsRequestTest.scala

@@ -38,7 +38,7 @@ abstract class AbstractApiVersionsRequestTest(cluster: ClusterInstance) {
 
   def sendUnsupportedApiVersionRequest(request: ApiVersionsRequest): ApiVersionsResponse = {
     val overrideHeader = IntegrationTestUtils.nextRequestHeader(ApiKeys.API_VERSIONS, Short.MaxValue)
-    val socket = IntegrationTestUtils.connect(cluster.boundPorts().get(0))
+    val socket = IntegrationTestUtils.connect(cluster.brokerBoundPorts().get(0))
     try {
       val serializedBytes = Utils.toArray(
         RequestUtils.serialize(overrideHeader.data, overrideHeader.headerVersion, request.data, request.version))

core/src/test/scala/unit/kafka/server/DescribeQuorumRequestTest.scala

@@ -35,7 +35,7 @@ class DescribeQuorumRequestTest(cluster: ClusterInstance) {
       val request = new DescribeQuorumRequest.Builder(
         singletonRequest(KafkaRaftServer.MetadataPartition)
       ).build(version.toShort)
-      val response = IntegrationTestUtils.connectAndReceive[DescribeQuorumResponse](request, cluster.boundPorts().get(0))
+      val response = IntegrationTestUtils.connectAndReceive[DescribeQuorumResponse](request, cluster.brokerBoundPorts().get(0))
 
       assertEquals(Errors.NONE, Errors.forCode(response.data.errorCode))
       assertEquals("", response.data.errorMessage)

core/src/test/scala/unit/kafka/server/GroupCoordinatorBaseRequestTest.scala

@@ -954,7 +954,7 @@ class GroupCoordinatorBaseRequestTest(cluster: ClusterInstance) {
   }
 
   protected def connectAny(): Socket = {
-    val socket: Socket = IntegrationTestUtils.connect(cluster.boundPorts().get(0))
+    val socket: Socket = IntegrationTestUtils.connect(cluster.brokerBoundPorts().get(0))
     openSockets += socket
     socket
   }
@@ -968,7 +968,7 @@ class GroupCoordinatorBaseRequestTest(cluster: ClusterInstance) {
   protected def connectAndReceive[T <: AbstractResponse](
     request: AbstractRequest
   ): T = {
-    IntegrationTestUtils.connectAndReceive[T](request, cluster.boundPorts().get(0))
+    IntegrationTestUtils.connectAndReceive[T](request, cluster.brokerBoundPorts().get(0))
   }
 
   protected def connectAndReceive[T <: AbstractResponse](

core/src/test/scala/unit/kafka/server/SaslApiVersionsRequestTest.scala

@@ -35,7 +35,7 @@ class SaslApiVersionsRequestTest(cluster: ClusterInstance) extends AbstractApiVe
     controllerSecurityProtocol = SecurityProtocol.SASL_PLAINTEXT
   )
   def testApiVersionsRequestBeforeSaslHandshakeRequest(): Unit = {
-    val socket = IntegrationTestUtils.connect(cluster.boundPorts().get(0))
+    val socket = IntegrationTestUtils.connect(cluster.brokerBoundPorts().get(0))
     try {
       val apiVersionsResponse = IntegrationTestUtils.sendAndReceive[ApiVersionsResponse](
         new ApiVersionsRequest.Builder().build(0), socket)
@@ -56,7 +56,7 @@ class SaslApiVersionsRequestTest(cluster: ClusterInstance) extends AbstractApiVe
     controllerSecurityProtocol = SecurityProtocol.SASL_PLAINTEXT
   )
   def testApiVersionsRequestAfterSaslHandshakeRequest(): Unit = {
-    val socket = IntegrationTestUtils.connect(cluster.boundPorts().get(0))
+    val socket = IntegrationTestUtils.connect(cluster.brokerBoundPorts().get(0))
     try {
       sendSaslHandshakeRequestValidateResponse(socket)
       val response = IntegrationTestUtils.sendAndReceive[ApiVersionsResponse](
@@ -72,7 +72,7 @@ class SaslApiVersionsRequestTest(cluster: ClusterInstance) extends AbstractApiVe
     controllerSecurityProtocol = SecurityProtocol.SASL_PLAINTEXT
   )
   def testApiVersionsRequestWithUnsupportedVersion(): Unit = {
-    val socket = IntegrationTestUtils.connect(cluster.boundPorts().get(0))
+    val socket = IntegrationTestUtils.connect(cluster.brokerBoundPorts().get(0))
     try {
       val apiVersionsRequest = new ApiVersionsRequest.Builder().build(0)
       val apiVersionsResponse = sendUnsupportedApiVersionRequest(apiVersionsRequest)

core/src/test/scala/unit/kafka/server/ShareGroupHeartbeatRequestTest.scala

@@ -933,7 +933,7 @@ class ShareGroupHeartbeatRequestTest(cluster: ClusterInstance) {
   }
 
   private def connectAndReceive(request: ShareGroupHeartbeatRequest): ShareGroupHeartbeatResponse = {
-    IntegrationTestUtils.connectAndReceive[ShareGroupHeartbeatResponse](request, cluster.boundPorts().get(0))
+    IntegrationTestUtils.connectAndReceive[ShareGroupHeartbeatResponse](request, cluster.brokerBoundPorts().get(0))
   }
 
   private def increasePartitions[B <: KafkaBroker](admin: Admin,

test-common/test-common-runtime/src/main/java/org/apache/kafka/common/test/ClusterInstance.java

@@ -447,12 +447,4 @@ public interface ClusterInstance {
         throw new AssertionError("Timing out after " + timeoutMs +
                 " ms since a leader was not elected for partition " + topicPartition);
     }
-
-    default List<Integer> boundPorts() {
-        return brokers().values().stream()
-                .map(KafkaBroker::socketServer)
-                .map(s -> s.boundPort(clientListener()))
-                .toList();
-
-    }
 }