* refactor of renaming libraries in layer tests
* 1. adds check for old API and new FE usafe
2. refactor of api_2 arg
* fix for tf_NMS test preprocessing
* take libs path from LD_LIBRARY_PATH env
* convert str to Path object
* use wheels path to libs
* print lib paths
* print lib paths
* use ov_frontend_path env
* also check if file to rename exists
* removes redundant prints
* copy instead of rename
* 1. copy instead of rename
2. adds some details to readme
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