Forget to update memory usage on message send timeout (apache#11761)

### Motivation
The producer doesn't release the meomry when msg send timeout

### Modifications
When the message timeout, release the memory too.

### Documentation
We don't need to update docs, because it's a bug fix.

### reproduce the problem
- start pulsar server
- start pulsar producer, which will send msg for 10 minutes(queueSize 0, memory limit 50MB)
- close the pulsar server
- wait for 10 minutes over.
- Look the heapdump, it shows pendingMessages size is 0, but Memory used 52429824

pulsar-broker/src/test/java/org/apache/pulsar/client/impl/ProducerMemoryLimitTest.java

@@ -0,0 +1,79 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.pulsar.client.impl;
+
+import lombok.Cleanup;
+import org.apache.pulsar.client.api.ProducerConsumerBase;
+import org.apache.pulsar.client.api.PulsarClient;
+import org.apache.pulsar.client.api.PulsarClientException;
+import org.apache.pulsar.client.api.SizeUnit;
+import org.testng.Assert;
+import org.testng.annotations.AfterMethod;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+import java.nio.charset.StandardCharsets;
+import java.util.concurrent.TimeUnit;
+
+@Test(groups = "broker-impl")
+public class ProducerMemoryLimitTest extends ProducerConsumerBase {
+
+    @Override
+    @BeforeMethod
+    protected void setup() throws Exception {
+        super.internalSetup();
+        super.producerBaseSetup();
+    }
+
+    @Override
+    @AfterMethod(alwaysRun = true)
+    protected void cleanup() throws Exception {
+        super.internalCleanup();
+    }
+
+    @Test(timeOut = 10_000)
+    public void testProducerTimeoutMemoryRelease() throws Exception {
+        initClientWithMemoryLimit();
+        @Cleanup
+        ProducerImpl<byte[]> producer = (ProducerImpl<byte[]>) pulsarClient.newProducer()
+                .topic("testProducerMemoryLimit")
+                .sendTimeout(5, TimeUnit.SECONDS)
+                .maxPendingMessages(0)
+                .enableBatching(false)
+                .create();
+        this.stopBroker();
+        try {
+            producer.send("memroy-test".getBytes(StandardCharsets.UTF_8));
+            throw new IllegalStateException("can not reach here");
+        } catch (PulsarClientException.TimeoutException ex) {
+            PulsarClientImpl clientImpl = (PulsarClientImpl) this.pulsarClient;
+            final MemoryLimitController memoryLimitController = clientImpl.getMemoryLimitController();
+            Assert.assertEquals(memoryLimitController.currentUsage(), 0);
+        }
+
+    }
+
+    private void initClientWithMemoryLimit() throws PulsarClientException {
+        pulsarClient = PulsarClient.builder().
+                serviceUrl(lookupUrl.toString())
+                .memoryLimit(50, SizeUnit.KILO_BYTES)
+                .build();
+    }
+
+}

pulsar-client/src/main/java/org/apache/pulsar/client/impl/ProducerImpl.java

@@ -1649,6 +1649,7 @@ private void failPendingMessages(ClientCnx cnx, PulsarClientException ex) {
                     log.warn("[{}] [{}] Got exception while completing the callback for msg {}:", topic, producerName,
                             op.sequenceId, t);
                 }
+                client.getMemoryLimitController().releaseMemory(op.uncompressedSize);
                 ReferenceCountUtil.safeRelease(op.cmd);
                 op.recycle();
             });