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

gtests/Config.FromFile.cpp

@@ -51,6 +51,7 @@ TEST_P(ConfigTest, FromFile)
 {
     TestCaseSpec testCase = GetParam();
     GlslangResult result;
+    result.validationResult = true;
 
     // Get the contents for input shader and limit configurations.
     std::string shaderContents, configContents;