ci : add an option to fail on compile warning (#3952)
* feat(ci): add an option to fail on compile warning
* Update CMakeLists.txt
* minor : fix compile warnings
ggml-ci
* ggml : fix unreachable code warnings
ggml-ci
* ci : disable fatal warnings for windows, ios and tvos
* ggml : fix strncpy warning
* ci : disable fatal warnings for MPI build
* ci : add fatal warnings to ggml-ci
ggml-ci
---------
Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>
