Fix embedding_valid dependency errors in executable modules

[dllllb]

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python -m dltranz.pl_fit_target

Traceback (most recent call last): File "/usr/lib/python3.8/runpy.py", line 192, in _run_module_as_main return _run_code(code, main_globals, None, File "/usr/lib/python3.8/runpy.py", line 85, in _run_code exec(code, run_globals) File "/home/dmitri/pytorch-lifestream/dltranz/pl_fit_target.py", line 6, in from dltranz.data_load.data_module.cls_data_module import ClsDataModuleTrain File "/home/dmitri/pytorch-lifestream/dltranz/data_load/data_module/cls_data_module.py", line 7, in from embeddings_validation.file_reader import TargetFile, ID_TYPE_MAPPING ModuleNotFoundError: No module named 'embeddings_validation'