[scudo] Refactor the secondary test (llvm#125595)

Remove all redundant code and create a couple of structs to handle
automatic init and destruction. This replaces the test fixtures in
prepartion for passing in multiple configs for some of these tests. This
is necessary because not all of the gtest features are supported here,
and there is no easy way to create a test fixture with a template.

Author: cferris1000

compiler-rt/lib/scudo/standalone/tests/scudo_unit_test.h

@@ -12,13 +12,15 @@
 #include <zxtest/zxtest.h>
 using Test = ::zxtest::Test;
 #define TEST_SKIP(message) ZXTEST_SKIP(message)
+#define TEST_HAS_FAILURE true
 #else
 #include "gtest/gtest.h"
 using Test = ::testing::Test;
 #define TEST_SKIP(message)                                                     \
   do {                                                                         \
     GTEST_SKIP() << message;                                                   \
   } while (0)
+#define TEST_HAS_FAILURE Test::HasFailure()
 #endif
 
 // If EXPECT_DEATH isn't defined, make it a no-op.