add (c) header

Author: jeromevdl

powertools-e2e-tests/handlers/largemessage/src/main/java/software/amazon/lambda/powertools/e2e/Function.java

@@ -1,3 +1,17 @@
+/*
+ * Copyright 2023 Amazon.com, Inc. or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
 package software.amazon.lambda.powertools.e2e;
 
 import com.amazonaws.services.lambda.runtime.Context;