"make all" does not build unit tests anymore

hi folks, just FYI, i just merged a change (https://github.com/ceph/ceph/pull/38501) which removes unit tests from the "all" target. if your work flow depends on this behavior, you might want to build "checks" or "tests" instead for building the unit tests. these two targets depend on the unit tests. to be more specific, the commit which introduced this change is https://github.com/ceph/ceph/pull/38501/commits/461ad210b3b1b26bca33682eb499.... see also https://cmake.org/cmake/help/latest/prop_tgt/EXCLUDE_FROM_ALL.html. cheers,