Make `find_module_by_name()` ignore module language suffix.
Make `find_module_by_name()` ignore module language suffix.

It seems that the workflow description YAML file can call modules with
strings like `smooth.py`, so we need to strip the `.py` suffix for
searching the module.

TissueMAPS/TmLibrary,TissueMAPS/TmLibrary,TissueMAPS/TmLibrary,TissueMAPS/TmLibrary,TissueMAPS/TmLibrary