Vulkan: Fix regression with IridescentDishWithOlives.
Vulkan: Fix regression with IridescentDishWithOlives.

When we introduced texture-based morphing, our custom depth resolver
needed to be updated to set up samplers correctly. This fixes a
validation error about shader stage access.

google/filament,google/filament,google/filament,google/filament,google/filament,google/filament,google/filament,google/filament,google/filament,google/filament,google/filament,google/filament