Allow exiting assertions in constructors and destructors

[OlekRaymond]

We can allow non-exiting gtest assertions to be called in constructors and destructors and simply throw to exit the functions ourselves.

If we want to keep track of things the user should do for migration we can do so with a constexpr check of __FUNCSIG__ and __PRETTY_FUNCTION__ Should be done under new issue

[OlekRaymond]

We can add this by moving to EXPECT_* macros and then throwing if the assert has failed/would fail.

i.e. #define MY_ASSERT_TRUE(condition) EXPECT_TRUE(condition); if (testing::Test::HasFatalFailure()) throw CppUnit::Failure("bad")

This should be behind an optional flag so streamed messages can still be appended to the gtest failure case when migrating.