(Vulkan) Prefer IMMEDIATE mode without vsync

[sonninnos]

Description

Some Vulkan related corrections:

• Use IMMEDIATE mode if available when vsync is disabled
  • Allows proper tearing and has much less input lag, and thus works properly with external scanline sync
• Add readable debug logging for supported and active presentation modes
• Impose minimum and maximum values for max swapchains, so that program won't freeze if cfg has been edited manually to below allowed 2, and also do the same for gl hard sync frames while at it
• Improve current fastforward frameskip Vulkan hack by not disabling it completely
  • Allows proper fastforward rates with external frame limiting without being totally choppy

Current present mode picking method works only if present modes come in specific order, and they seem to be random based on platform. Here on Windows the order is so that currently MAILBOX will be picked first, which is bad for non-vsync:

[DEBUG] [Vulkan]: Swapchain supports present mode: FIFO.
[DEBUG] [Vulkan]: Swapchain supports present mode: FIFO_RELAXED.
[DEBUG] [Vulkan]: Swapchain supports present mode: MAILBOX.
[DEBUG] [Vulkan]: Swapchain supports present mode: IMMEDIATE.