When the list of extensions is constructed for `vkCreateDevice` it
uses a function that retrieves all extensions just to iterate to
check a specific extension is supported. However there is already a
list cached that is that is the subset of the desired extensions that
are supported by the device.
This cleanup will use that list instead of requiring all supported
extensions.
Pull Request: https://projects.blender.org/blender/blender/pulls/141074
225449b96d