Remove std::bind usages from Code/Editor (#3358)

A few small modernizations as well ( override )

Signed-off-by: nemerle <96597+nemerle@users.noreply.github.com>

Code/Editor/Lib/Tests/test_ModularViewportCameraController.cpp

@@ -37,7 +37,7 @@ namespace UnitTest
             m_inputChannelMapper = AZStd::make_unique<AzToolsFramework::QtEventToAzInputMapper>(m_rootWidget.get(), TestViewportId);
         }
 
-        void TearDown()
+        void TearDown() override
         {
             m_inputChannelMapper.reset();