Fix python instructions collecting method for python 3.9 and older

[tamarinvs19]

Description

Used dis.get_instructions() instead of __code__.co_lines() for instruction collecting if python interpreter version is older then 3.10

How to test

Manual tests

1. Run utbot on python project with python 3.9 (3.8, ...)
2. Run utbot on python project with python 3.10 (3.11, 3.12)

Self-check list

Check off the item if the statement is true. Hint: [x] is a marked item.

Please do not delete the list or its items.

• I've set the proper labels for my PR (at least, for category and component).
• PR title and description are clear and intelligible.
• I've added enough comments to my code, particularly in hard-to-understand areas.
• 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]

Doesn't utbot-python-executor need to update version?

Took a deeper look