### What happened?

Using JDK 11 Http Client prevents reusing of DevTools instance. Earlier, this was not a problem since Selenium used a single instance of AsyncHttpClient and it was only closed when the JVM shuts down. But with the JdkHttpClient, Selenium uses a new instance each time and closes it too. 
Changes made as part of https://github.com/SeleniumHQ/selenium/pull/11345, which assigns the client to null while closing causes an NPE when re-using DevTools instance. The changes were made to prevent memory leaks. 

I am not sure about the right approach to address this. I will need to look into it further.

### How can we reproduce the issue?

```shell
Run https://github.com/SeleniumHQ/selenium/blob/trunk/java/test/org/openqa/selenium/devtools/DevToolsReuseTest.java with JDK 11 Http Client
```


### Relevant log output

```shell
Cannot invoke "java.net.http.HttpClient.newWebSocketBuilder()" because "this.client" is null
java.lang.NullPointerException: 
	at org.openqa.selenium.remote.http.jdk.JdkHttpClient.openSocket(JdkHttpClient.java:168)
	at org.openqa.selenium.devtools.Connection.reopen(Connection.java:92)
	at org.openqa.selenium.devtools.DevTools.createSession(DevTools.java:129)
	at org.openqa.selenium.devtools.DevTools.createSession(DevTools.java:117)
	at org.openqa.selenium.devtools.DevToolsReuseTest.shouldBeAbleToCloseDevToolsAndCreateNewInstance(DevToolsReuseTest.java:41)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
```


### Operating System

macOS Ventura

### Selenium version

Java 4.13.0

### What are the browser(s) and version(s) where you see this issue?

Chrome  117

### What are the browser driver(s) and version(s) where you see this issue?

ChromeDriver Version: 117.0.5938.149

### Are you using Selenium Grid?

_No response_
package org.openqa.selenium.devtools;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static org.openqa.selenium.internal.Debug.getDebugLogLevel;
import static org.openqa.selenium.json.Json.MAP_TYPE;
import static org.openqa.selenium.remote.http.HttpMethod.GET;
import java.io.Closeable;
import java.io.StringReader;
import java.time.Duration;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import java.util.function.Consumer;
import java.util.logging.Level;