Adding missing o3de copyright headers

Signed-off-by: Gene Walters <genewalt@amazon.com>

AutomatedTesting/Gem/PythonCoverage/Code/pythoncoverage_editor_shared_files.cmake

@@ -1,12 +1,8 @@
 #
-# All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
-# its licensors.
+# Copyright (c) Contributors to the Open 3D Engine Project
+# 
+# SPDX-License-Identifier: Apache-2.0 OR MIT
 #
-# For complete copyright and license terms please see the LICENSE at the root of this
-# distribution (the "License"). All use of this software is governed by the License,
-# or, if provided, by the license below or the license accompanying this file. Do not
-# remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #
 
 set(FILES