Fix build due to phasing off SecurityManager usage in favor of Java Agent (#1916)

Signed-off-by: Pranav Reddy <pranavrd@amazon.com>

Author: pranu2502

build.gradle

@@ -179,6 +179,26 @@ allprojects {
     plugins.withId('java') {
         sourceCompatibility = targetCompatibility = "21"
     }
+
+    configurations {
+        agent
+    }
+    
+    task prepareAgent(type: Copy) {
+        from(configurations.agent)
+        into "$buildDir/agent"
+    }
+
+    dependencies {
+        agent "org.opensearch:opensearch-agent-bootstrap:${opensearch_version}"
+        agent "org.opensearch:opensearch-agent:${opensearch_version}"
+        agent "net.bytebuddy:byte-buddy:${versions.bytebuddy}"
+    }
+
+    tasks.withType(Test) {
+        dependsOn prepareAgent
+        jvmArgs += ["-javaagent:" + project.layout.buildDirectory.file("agent/opensearch-agent-${opensearch_version}.jar").get()]
+    }
 }
 
 dependencies {