Refactor name and module management in python code generation and fuzzing

[tamarinvs19]

Description

Module and name of python object have been separated to different fields in PythonClassId. Now we have two constructors:

• from module and object name (without module prefix)
• from full name (it expect that object name doesn`t contain dots)

Text type representations have been replaced to constants from util file.

Also fixed problem with objects which have same id and name but different fields in state after / state before.

Fixes #1850

How to test

Manual tests

See #1850

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