We will use this extension in order to implement vertex
binding divisors other than 1 for per-instance attributes.
Will be *required* as soon as support by wine and Vulkan
drivers is widely available.
Reduces the CPU overhead of descriptor set updates, which usually
happen once per draw call. Gains seem to be minor in most games,
some outliers show significantly better performance (i.e. Tomb Raider).
Support for extensions can now be queried from the device
object in an efficient way. This will allow the backend to
use optional extensions for the purpose of optimization.
