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

Gems/AWSClientAuth/Code/Tests/AWSClientAuthGemMock.h

@@ -30,7 +30,7 @@
 #include <AWSCoreBus.h>
 #include <ResourceMapping/AWSResourceMappingBus.h>
 #include <AWSClientAuthBus.h>
-#include <AWSNativeSDKInit/AWSNativeSDKInit.h>
+#include <AWSNativeSDKTestManager.h>
 #include <HttpRequestor/HttpRequestorBus.h>
 
 #include <aws/core/utils/Outcome.h>
@@ -542,7 +542,7 @@ namespace AWSClientAuthUnitTest
             m_jobContext.reset(aznew AZ::JobContext(*m_jobManager, *m_jobCancelGroup));
             AZ::JobContext::SetGlobalContext(m_jobContext.get());
 
-            AWSNativeSDKInit::InitializationManager::InitAwsApi();
+            AWSNativeSDKTestLibs::AWSNativeSDKTestManager::Init();
             m_cognitoIdentityProviderClientMock = std::make_shared<CognitoIdentityProviderClientMock>();
             m_cognitoIdentityClientMock = std::make_shared<CognitoIdentityClientMock>();
         }
@@ -557,8 +557,7 @@ namespace AWSClientAuthUnitTest
             m_cognitoIdentityProviderClientMock.reset();
             m_cognitoIdentityClientMock.reset();
 
-            AWSNativeSDKInit::InitializationManager::Shutdown();
-
+            AWSNativeSDKTestLibs::AWSNativeSDKTestManager::Shutdown();
 
             AZ::AllocatorInstance<AZ::ThreadPoolAllocator>::Destroy();