[kutil] Fix failing heap allocator tests

The tests clearly haven't even been built in a while. I've added a
helper script to the project root. Also added a kassert() handler that
will allow tests to catch or fail on asserts.

modules.yaml

@@ -313,7 +313,6 @@ modules:
         deps:
             - kutil
         source:
-            - src/tests/address_manager.cpp
             - src/tests/constexpr_hash.cpp
             - src/tests/linked_list.cpp
             - src/tests/logger.cpp