Updated AnimNode registration in LyShine and Maestro to register to a member variable map (#6786)

* Updated the Maestro MovieSystem and LyShine AnimationSystem to register
Anim Nodes and Anim Params into a member variable map

Previously the registration was occuring in a global variable map inside
of Movie.cpp and UiAnimationSystem.cpp

Rolled back the changes to update the CUiAnimNode and CAnimParamType to
use the stateless allocator in their m_name string member.
This was only needed because those types were used in global memory.

Signed-off-by: lumberyard-employee-dm <56135373+lumberyard-employee-dm@users.noreply.github.com>

* Updated the AZStd::hash specializations for basic_string and
basic_fixed_string to be transparent.

This allows hashing of types that aren't basic_string or
basic_fixed_string using the hash specializations for those types
without needing to create an instance of those types.

Signed-off-by: lumberyard-employee-dm <56135373+lumberyard-employee-dm@users.noreply.github.com>

* Adding call to disable saving of the UserSettings.xml in the DisplaySettingsPythonBindingsFixture to avoid race condition running the test in parallel

Signed-off-by: lumberyard-employee-dm <56135373+lumberyard-employee-dm@users.noreply.github.com>

Code/Editor/Lib/Tests/test_DisplaySettingsPythonBindings.cpp

@@ -35,6 +35,11 @@ namespace DisplaySettingsPythonBindingsUnitTests
 
             m_app.Start(appDesc);
             m_app.RegisterComponentDescriptor(AzToolsFramework::DisplaySettingsPythonFuncsHandler::CreateDescriptor());
+
+            // Without this, the user settings component would attempt to save on finalize/shutdown. Since the file is
+            // shared across the whole engine, if multiple tests are run in parallel, the saving could cause a crash
+            // in the unit tests.
+            AZ::UserSettingsComponentRequestBus::Broadcast(&AZ::UserSettingsComponentRequests::DisableSaveOnFinalize);
         }
 
         void TearDown() override