Update SDK benchmarks to be able to run with Java 25 (aws#6775)

Author: zoewangg

test/sdk-benchmarks/pom.xml

@@ -279,12 +279,15 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-compiler-plugin</artifactId>
-                    <version>3.1</version>
+                    <version>3.8.0</version>
                     <!-- Override the configuration in the parent-->
                     <configuration combine.self="override">
                         <compilerVersion>${javac.target}</compilerVersion>
                         <source>${javac.target}</source>
                         <target>${javac.target}</target>
+                        <annotationProcessors>
+                            <annotationProcessor>org.openjdk.jmh.generators.BenchmarkProcessor</annotationProcessor>
+                        </annotationProcessors>
                     </configuration>
                     <executions>
                         <execution>