This way the outputs are available for further downstream processing, e.g. with
grep. For TTS/bin/synthesize.py, if --pipe_out is set, log to stderr because
then only the output audio stream should be on stdout, e.g. to pipe it to aplay.
* fix imports in tune_wavegrad
* load_config returns Coqpit object instead None
* set action (store true) for flag "--use_cuda"; start to tune if module is running as the main program
* fix var order in the result of batch collating
* make style
* make style with black and isort