Streamline swapchain classes

[jherico]

Description

Fixes #972

Updates to Swapchain & HPPSwapchain

• Eliminate the surface_formats and preset_modes which are only ever used during the swapchain creation in the constructor
• Eliminate the image_usage_flags member in favor of the SwapchainProperties/HPPSwapchainProperties image_usage member
• Redefine all constructors in terms of a private constructor that accepts a ``SwapchainProperties/HPPSwapchainProperties` parameter
• Convert SwapchainProperties::image_usage from VkImageUsageFlags to std::set<VkImageUsageFlagBits>
  • I'd have preferred to leave it and use VkImageUsageFlags everywhere in the C bindings code, but then all the overloaded constructors and downstream members can't distinguish between VkImageUsageFlags and uint32_t. This isn't a problem in the C++ bindings because vk::ImageUsageFlags isn't the same fundamental type as uint32_t.

Other files

• Updated HPPApiVulkanSample and HPPRenderContext swapchain utility functions to use vk::ImageUsageFlags instead of std::set<vk::ImageUsageFlagBits>
• Updated HPPRenderContext and RenderContext to remove the unused swapchain_properties member.

General Checklist:

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• My code follows the coding style
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• I have used existing framework/helper functions where possible
• My changes do not add any regressions
• I have tested every sample to ensure everything runs correctly
• This PR describes the scope and expected impact of the changes I am making

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[JoseEmilio-ARM]

As discussed in #963, please let that be merged before this one, thanks!

[asuessenbach]

Maybe some more descriptive name than flags_in? Like to_set, or split or so?
And why do you sort the flags into a std::set, not a std::vector?

[asuessenbach]

typo: inittial_properties