tests: Add a guard around noexcept in vktestbinding.h

tests: Add a guard around noexcept in vktestbinding.h

VS2013 does not provide 'noexcept'. Layers had multiple occurences
of a NOEXCEPT macro to protect the VS2013 build. This commit
consolidates that macro to a single location in vk_sdk_platform.h,
which is also visible to the layer tests via test_common.h.

Updates the vktestbinding.h occurences of 'noexcept' to use the
NOEXCEPT macro.

Change-Id: I38bf8c08cda6fe75de78dff69050a913b47f91b1