Silence aws logging for unit test and have a new AWSNativeSDK as entry point for test env (#6865)

* Silence aws logging for unit test
* Create a new AWSNativeSDK entry point for test environment only
* Update naming for target and file

Code/Tools/AWSNativeSDKInit/tests/libs/AWSNativeSDKTestManager.cpp

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+
+#include <AWSNativeSDKTestManager.h>
+
+#include <AzCore/Module/Environment.h>
+#include <AzTest/Utils.h>
+
+#include <AWSNativeSDKInit/AWSLogSystemInterface.h>
+#include <aws/core/Aws.h>
+#include <aws/core/utils/logging/AWSLogging.h>
+
+namespace AWSNativeSDKTestLibs
+{
+    AZ::EnvironmentVariable<AWSNativeSDKTestManager> AWSNativeSDKTestManager::s_sdkManager = nullptr;
+
+    AWSNativeSDKTestManager::AWSNativeSDKTestManager()
+    {
+        AZ::Test::SetEnv("AWS_DEFAULT_REGION", "us-east-1", 1);
+        m_awsSDKOptions.memoryManagementOptions.memoryManager = &m_memoryManager;
+        Aws::InitAPI(m_awsSDKOptions);
+    }
+
+    AWSNativeSDKTestManager::~AWSNativeSDKTestManager()
+    {
+        Aws::ShutdownAPI(m_awsSDKOptions);
+        AZ::Test::UnsetEnv("AWS_DEFAULT_REGION");
+    }
+
+    void AWSNativeSDKTestManager::Init()
+    {
+        s_sdkManager = AZ::Environment::CreateVariable<AWSNativeSDKTestManager>(AWSNativeSDKTestManager::SdkManagerTag);
+    }
+
+    void AWSNativeSDKTestManager::Shutdown()
+    {
+        s_sdkManager = nullptr;
+    }
+}