Add a way to express the depence of a required feature

[christophe-lunarg]

EG: Vulkan 1.4 requires [pipelineProtectedAccess](https://registry.khronos.org/vulkan/specs/latest/html/vkspec.html#features-pipelineProtectedAccess) only if [protectedMemory](https://registry.khronos.org/vulkan/specs/latest/html/vkspec.html#features-protectedMemory) is supported