Basic implementation of descriptor update template. Only supports VK_DESCRIPTOR_UPDATE_TEMPLATE_TYPE_DESCRIPTOR_SET template type. Bug b/123244275 Change-Id: Iaf7c1e52bee6d2683a2f34bd2f780396aa953442 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/26568Tested-by: Alexis Hétu <sugoi@google.com> Reviewed-by: Nicolas Capens <nicolascapens@google.com> Reviewed-by: Chris Forbes <chrisforbes@google.com>
