build: rename layers utils lib and fix Windows CMake code
build: rename layers utils lib and fix Windows CMake code

Rename utils lib to VkLayer_utils to use same namespace as
the layers.
The previous Windows CMake code attempted to build both
dynamic and static utils libs, succeeding with only the static.
Change the CMake code to only attempt to build the static lib.

sashinde/VulkanTools,sashinde/VulkanTools,sashinde/VulkanTools,sashinde/VulkanTools