state is unused in the branch where with_state is false

vk_texture_cache: Use VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL when possible

yuzu_cmd: Make use of fullscreen_mode setting

input_common: Make button threshold customizable

Reverts 48259de0c1a6a1aca77eec31cb8aca5ca2b680dd to the previous
hierarchy and fixes the resolution issue with this fullscreen mode.
yuzu-cmd will now read the fullscreen_mode setting and use it
appropriately.