Modify testing to only record validation pass/fail

* Changed unit tests to only record known the validation pass/fail
status
 * errors are output as part of the failure message if the result is
 unexpected
 * can turn off validation for each test individually
* Moved some SPV_KHR_vulkan_memory_model tests to be compiled for Vulkan
1.1

Test/baseResults/hlsl.constructimat.frag.out

@@ -543,10 +543,7 @@ gl_FragCoord origin is upper left
 0:?   Linker Objects
 0:?     '@entryPointOutput' (layout( location=0) out int)
 
-error: SPIRV-Tools Validation Errors
-error: Matrix types can only be parameterized with floating-point types.
-  %mat4v4int = OpTypeMatrix %v4int 4
-
+Validation failed
 // Module Version 10000
 // Generated by (magic number): 80007
 // Id's are bound by 98