Fix ART Blit detection regression and add D24S8 <-> RGBA8 conv to Vulkan

Fix image update/download error when width too small

main: Shorten AMD FSR status bar text

Move the cmake submodule checkout command to a new line

Replace keys error pop up

video_core: Implement S8_UINT format

By default, no AA is applied, not FXAA

AMD officially markets FSR as AMD FidelityFX™️ Super Resolution

AMD'S FIDELITYFX SR -> FSR

gl_texture_cache: Implement pixel format conversions for copies

Prevent window flickering when holding Esc

It should be noted that on Windows, only nvidia gpus support this format natively as of this commit.

ci: Don't fetch submodules when fetching PRs

hotkeys: Don't allow hotkeys to spam

Reported on discord by Levlight. Don't try to exit fullscreen if it's already off.

This allows the usage of the FormatConversionPass to be applied to more than the previously used BGR conversion scenarios.

Project A.R.T. Advanced Rendering Techniques

CMakeLists: Update catch to 2.13.7

Keeps the testing libraries up to date.