do_cmake.sh won't do Debug build anymore

hi folks, tl;dr: it's a notice/RFC that `do_cmake.sh` won't pass do Debug build anymore after https://github.com/ceph/ceph/pull/30250 gets merged. long story: i am refactoring do_cmake.sh so we can build Release build by passing '-DCMAKE_BUILD_TYPE=Release' to it. so i can leverage the existing scripts for running performance test. the reason why i'd prefer change the existing behavior is that i want to keep do_cmake.sh simpler and straightforward, if we want to keep "-DCMAKE_BUILD_TYPE=Debug" as the default behavior, we would need to either introduce another command line argument or parse and for this parameter passed in. instead, run-make-check.sh will pass -DCMAKE_BUILD_TYPE=Debug to cmake, so if you are using this script to build your tree or run "make check", you are not impacted. please let me know if you have any concerns. otherwise, i will update this script by the end of the week (Oct 12). cheers, -- Regards Kefu Chai