Add close to fix CWE-404 (#12908)

Author: samuel-poirier

instrumentation/runtime-telemetry/runtime-telemetry-java8/javaagent/src/main/java/io/opentelemetry/instrumentation/javaagent/runtimemetrics/java8/JarDetails.java

@@ -219,8 +219,10 @@ protected Properties getPom() throws IOException {
           return null;
         }
         Properties props = new Properties();
-        props.load(jarFile.getInputStream(jarEntry));
-        pom = props;
+        try (InputStream in = jarFile.getInputStream(jarEntry)) {
+          props.load(in);
+          pom = props;
+        }
       }
     }
     return pom;

javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/ExtensionClassLoader.java

@@ -77,8 +77,7 @@ public static ClassLoader getInstance(
   }
 
   private static void includeEmbeddedExtensionsIfFound(List<URL> extensions, File javaagentFile) {
-    try {
-      JarFile jarFile = new JarFile(javaagentFile, false);
+    try (JarFile jarFile = new JarFile(javaagentFile, false)) {
       Enumeration<JarEntry> entryEnumeration = jarFile.entries();
       String prefix = "extensions/";
       File tempDirectory = null;