expose vulkan physical device capabilities, enabled device extensions

[i509VCB]

Description
Well this pull request expanded a bit as you can see in the edits.

• Expose physical device properties and PhysicalDeviceCapabilities from Vulkan's Adapter
• For Vulkan's Device, expose the following
  • Enabled device extensions
  • Raw physical device (needed for getting data associated with a device that is too varied to calculate at creation time).
  • The instance the device is from (for getting said physical device data)
  • Version of the instance on the device (For above)
  • Enabled instance extensions (Also for above)
• For Vulkan's Adapter, expose the following
  • The instance
  • The version of the instance
  • Enabled instance extensions

[cwfitzgerald]

Baring one comment, I think this is fine. My only question is more design focused, should we be exposing things like this or should we be making the fields public, which would potentially allow creating wgpu-hal types from the raw vulkan stuff.

[cwfitzgerald]

TYSM