scripts: Add parameter_validation.h to doc validator
scripts: Add parameter_validation.h to doc validator

As the python script doesn't know where the generated source ends up,
added a search of the build, dbuild, and release layers dirs. This
generated file contains LOTS of VUIDs.

Change-Id: I767ae2c3af11a0686ee629edb9964b294b5f7e08

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools