test: fix error message in opencl ULTs

- opencl ults do not require changing directory
- fix base execution directory for all aub test modes

Signed-off-by: Mateusz Hoppe <mateusz.hoppe@intel.com>

shared/test/unit_test/ult_specific_config.cpp

@@ -78,12 +78,16 @@ void setupTestFiles(std::string testBinaryFiles, int32_t revId) {
 }
 
 std::string getBaseExecutionDir() {
-    if (testMode != TestMode::aubTests) {
+    if (!isAubTestMode(testMode)) {
         return "shared/";
     }
     return "";
 }
 
+bool isChangeDirectoryRequired() {
+    return true;
+}
+
 void addUltListener(::testing::TestEventListeners &listeners) {
     listeners.Append(new BaseUltConfigListener);
 }