- Define test_utils_interactive_sync as DEFAULT_MODULE in Makefile.tests_common
- For tests disabling autoinit, add test_utils_interactive_sync to main
- Add DISABLE_MODULE += test_utils_interactive_sync for tests requiring
sudo, `tests/shell`, `tests/minimal` and `tests/stdin`
- Add shell_commands to tests/periph_wdt and tests/struct_tm_utility to
pull `r` and `s` commands
- Remove includes and usage in `tests/main.c` for tests that where
already using test_utils_interactive_sync
This moves 'unittests/tests-cpp_ctors' to its own test.
It prevents requiring 'cpp' in the 'unittests' that forced almost all
architectures to link the unittests with `g++`.
It also removes the need to have disabled tests for architectures.
Some boards were actually not big enough to compile unittests.
But were hidden by the 'cpp' missing feature.
Blacklist boards that were disabled for cpp test even though they
provide the 'cpp' feature.
