For some boards `make reset` is only possible if a serial connection
is not already open or its execution might disrupt it. This
causes some tests to fail since before running a test the board
is reset.
`make reset` is currently used as a synchronization mechanism between
the application and the test script. With `test_utils_interactive_sync`
this is no longer needed so call `make reset` before `cleanterm` instead
of after when `test_utils_interactive_sync` is used.
Allow setting TESTRUNNER_RESET_AFTER_TERM=1 to keep the previous
behaviour for `examples/%/tests`.
a77594a348