EXSWHTEC-94 - Implement helper classes and functions for memory tests (#2978)

- Implement helper classes and functions for memory tests
- Remove c++14 standard constraint on memory tests
- Remove GenerateLinearAllocationFlagCombinations until finished

tests/catch/unit/memory/CMakeLists.txt

@@ -183,5 +183,4 @@ endif()
 
 hip_add_exe_to_target(NAME MemoryTest
                       TEST_SRC ${TEST_SRC}
-                      TEST_TARGET_NAME build_tests
-                      COMPILE_OPTIONS -std=c++14)
+                      TEST_TARGET_NAME build_tests)