Add lombok annotation processor in maven to fix builds on recent jdk versions.

Since jdk23 lombok needs to be registered as an annotation processor explicitly otherwise it will not process java sources. This change applies the [lombok recommended method](https://projectlombok.org/setup/maven) of applying the annotation processor to fix builds on jdk23+

Author: apache-hb

tools/code-generation/generator/pom.xml

@@ -11,6 +11,10 @@
     <name>AWS Client Generator</name>
     <url>http://aws.amazon.com</url>
 
+    <properties>
+        <lombok.version>1.18.42</lombok.version>
+    </properties>
+
     <build>
         <plugins>
             <plugin>
@@ -20,6 +24,13 @@
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                            <version>${lombok.version}</version>
+                        </path>
+                    </annotationProcessorPaths>
                 </configuration>
             </plugin>
             <plugin>
@@ -103,7 +114,7 @@
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
-            <version>1.18.30</version>
+            <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>