Use Mockito version compatible with Java 8

[EgorkaKulikov]

Description

Newest versions of Mockito are not compatible with Java 8, see https://www.davidvlijmincx.com/posts/upgrade-to-mockito-5
As UtBot still supports it, we use 4.11.0 version everywhere.

How to test

Manual tests

Basic mocking regression.

Self-check list

• 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.