Added corrections related to code review:

-added binary_operator_half.cpp and binary_two_results_i_half.cpp
-address sanitizer errors fixed
-extending list of special half values
-removed unnecessary relaxed math references in half tests
-corrected conditions to verify ulp narrowing of computation results
-several refactoring and cosmetics corrections

test_conformance/math_brute_force/CMakeLists.txt

@@ -9,8 +9,10 @@ set(${MODULE_NAME}_SOURCES
     binary_i_half.cpp
     binary_operator_double.cpp
     binary_operator_float.cpp
+    binary_operator_half.cpp
     binary_two_results_i_double.cpp
     binary_two_results_i_float.cpp
+    binary_two_results_i_half.cpp
     common.cpp
     common.h
     function_list.cpp