Terrain Physics Heightfield support

* New Heightfield Components

Signed-off-by: John Jones-Steele <jjjoness@amazon.com>

* Misc PR fixes
* Fixed linux build failure from bad #include
* Renamed "Terrain Physics Collider" to "Terrain Physics Heightfield Collider" per physics team feedback
* Fixed 1/5 -> 1/4 typo in a comment
* Added missing member copies in HeightfieldShapeConfiguration

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

* Addressed PR feedback

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

* Changes from review

Signed-off-by: John Jones-Steele <jjjoness@amazon.com>

* Remove tabs accidently added

Signed-off-by: John Jones-Steele <jjjoness@amazon.com>

* Fixed overly complicated scaling math.

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

* Added comments to make it more obvious what's happening on CreateEnd / DestroyBegin.

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

* Moved Heightfield CreatePxGeometryFromConfig into its own function

Signed-off-by: John Jones-Steele <jjjoness@amazon.com>

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

Gems/Terrain/Code/Source/TerrainModule.cpp

@@ -18,6 +18,7 @@
 #include <Components/TerrainLayerSpawnerComponent.h>
 #include <Components/TerrainSurfaceGradientListComponent.h>
 #include <Components/TerrainSurfaceDataSystemComponent.h>
+#include <Components/TerrainPhysicsColliderComponent.h>
 #include <TerrainRenderer/Components/TerrainSurfaceMaterialsListComponent.h>
 #include <TerrainRenderer/Components/TerrainMacroMaterialComponent.h>
 
@@ -37,6 +38,7 @@ namespace Terrain
                 TerrainMacroMaterialComponent::CreateDescriptor(),
                 TerrainSurfaceGradientListComponent::CreateDescriptor(),
                 TerrainSurfaceDataSystemComponent::CreateDescriptor(),
+                TerrainPhysicsColliderComponent::CreateDescriptor()
             });
     }