Gfx: Swapchain resize support in HAL

[kvark]

Vulkan allows these things that we currently don't provide:

1. destroying swapchains
2. providing the old swapchain in when creating a new one, which allows not only to re-use resources but also keep presenting the old image

[dnfeldman]

For implementation requirements, are you thinking:
For 1), add fn destroy(&self) -> (); to hal::window::Swapchain trait and actually implement that functionality for all backends?
For 2), make hal::window::SwapchainConfig also accept an optional Swapchain and then modify existing #create_swapchain() implementations to return SwapchainConfig's Swapchain if it exists?

[msiglreith]

1. We are creating swapchains from device, therefore I would suggest adding destroy_swapchain() to the device trait
2. I would add a new argument to create_swapchain, less reference/lifetime hassle inside the SwapchainConfig struct imo.

[dnfeldman]

Do you want the actual implementations of destroy_swapchain() and optional swapchain creation from old swapchain in create_swapchain() to be a part of this issue or should it be separate issues for each backend?

[kvark]

@hriundel it's not a super huge thing, so I believe we can track it all here.

[mpalomas]

out of curiosity may I know if this task is somehow related to bug #1780 ?

[JohnDoneth]

It should be possible to close this issue as well due to resizing support in #2052 being merged. 👍 🎉