Revert to old behavior in GIPA for old apps

Revert to old behavior in GIPA for old apps

Vulkan header updated 1.2.193 changed the behavior of vkGetInstanceProcAddr for
global entrypoints. They used to always be returned regardless of the value of
the instance paramtere. The spec was amended in this version to only allow
querying global level entrypoints with a NULL instance. However, as to not
break old applications, the new behavior is only applied if the instance passed
in is both valid and minor version is greater than 1.2, which was when this
change in behavior occurred. Only instances with a newer version will get the
new behavior.