Include python-modules for UtBot Python to UtBot project

[tamarinvs19]

Description

Now we have a problem: when I change logic in my module utbot-executor in utbot's code I change only version of the module and nobody can check my changes in my module. And the same problem with utbot-mypy-runner.

Possible solution

Create a sub directory of the utbot repository and put our modules in this directory.

Next step: include our code to the utbot plugin and install it without pip (or install from local files, see https://packaging.python.org/en/latest/tutorials/installing-packages/#installing-from-a-local-src-tree)

[tamarinvs19]

Done (PRs #2510 and #2195)