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.namespace.frag.out

@@ -101,10 +101,7 @@ gl_FragCoord origin is upper left
 0:?     'N2::gf' ( global float)
 0:?     '@entryPointOutput' (layout( location=0) out 4-component vector of float)
 
-error: SPIRV-Tools Validation Errors
-error: OpFunctionCall Function <id>'s parameter count does not match the argument count.
-  %43 = OpFunctionCall %v4float %N2__N3__C1__getVec_
-
+Validation failed
 // Module Version 10000
 // Generated by (magic number): 80007
 // Id's are bound by 54