Make vulkaninfo removal of promoted extension structures optional

[charles-lunarg]

PR #948 removed extension structures from vulkaninfo output that were promoted to core Vulkan, eg into the VkPhysicalDeviceVulkan(11|12|13)(Features|Properties) structs. It was done for Vulkan profile generation, but it users who are looking for the extension structures explicitly as they no longer appear.

PR 948 was a necessary contribution to allow correct Vulkan-Profile output, but should be a command line option, eg ~~--remove-promoted-extensions~~ --strip_duplicate_struct.