Add socket channel for coverage collection

[tamarinvs19]

Description

New UDP socket channel has been added for sending numbers of the covered lines while python code are executing.

Now if function is too long, we can minimise test case by covered lines before execution timeout.

Fixes #2100

How to test

Manual tests

1. Open a long python function, e.g. from utbot-python/samples/easy_samples/long_function_coverage.py

import time

def long_function(x: int):
    x += 4
    x /= 2
    x += 100
    x *= 3
    x -= 15
    time.sleep(2000)
    return x

2. Try to generate tests with a normal Handing test timeout (1000ms) and Test generation timeout (60s)
3. Expected; test have been minimised (for long_function_coverage.py only one test)

Self-check list

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• The functionality I've repaired, changed or added is covered with automated tests.
• Manual tests have been provided optionally.
• The documentation for the functionality I've been working on is up-to-date.

[tochilinak]

I think it is time to create a common place for storing and publishing our Python scripts, because now we cannot review each other's scripts (and, more importantly, fix bugs). Kotlin part is OK.

[tamarinvs19]

I think it is time to create a common place for storing and publishing our Python scripts, because now we cannot review each other's scripts (and, more importantly, fix bugs). Kotlin part is OK.

I agree. Created Issue #2208 and started working on it.