MID TextureCollections don't work with Post Process Overlays

TextureCollectionParameters in a material assigned to a Post Process Overlay are not overridden by a MID because CopyInterpParameters in Engine\Source\Runtime\Engine\Private\Materials\MaterialInstanceDynamic.cpp is missing the logic to override that type. Adding the following code fixes this issue:

for (auto& it : Source->TextureCollectionParameterValues)
{
	SetTextureCollectionParameterValue(it.ParameterInfo.Name, it.ParameterValue);
}

• Create a Post Process Material that uses a Texture Collection Parameter
• At runtime create a MID to change this parameter
• Attempt to override the parameter value in the MID

Expected

The parameter value is overridden

Actual

The parameter value is not overridden