Add benchmarks and unit tests for GetSurfacePoints*. (#7216)

* Add benchmarks and unit tests for GetSurfacePoints*.
The benchmarks are very enlightening - the existing implementation of GetSurfacePointsFromRegion (and GetSurfacePointsFromList) is currently measurably *slower* than just calling GetSurfacePoints() many times in a loop.  This is due to all of the extra allocation overhead that's currently happening with the way these data structures are built.

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Small syntax improvement

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Small update to the benchmark to use filtered results.

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

* Removed accidental extra include.

Signed-off-by: Mike Balfour <82224783+mbalfour-amzn@users.noreply.github.com>

Gems/SurfaceData/Code/Tests/SurfaceDataTestFixtures.cpp

@@ -0,0 +1,36 @@
+/*
+ * 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 <Tests/SurfaceDataTestFixtures.h>
+#include <SurfaceData/Tests/SurfaceDataTestMocks.h>
+
+#include <AzFramework/Components/TransformComponent.h>
+#include <SurfaceDataSystemComponent.h>
+#include <Components/SurfaceDataColliderComponent.h>
+#include <Components/SurfaceDataShapeComponent.h>
+
+
+namespace UnitTest
+{
+    void SurfaceDataTestEnvironment::AddGemsAndComponents()
+    {
+        AddDynamicModulePaths({ "LmbrCentral" });
+
+        AddComponentDescriptors({
+            AzFramework::TransformComponent::CreateDescriptor(),
+
+            SurfaceData::SurfaceDataSystemComponent::CreateDescriptor(),
+            SurfaceData::SurfaceDataColliderComponent::CreateDescriptor(),
+            SurfaceData::SurfaceDataShapeComponent::CreateDescriptor(),
+
+            MockPhysicsColliderComponent::CreateDescriptor()
+        });
+    }
+}
+