[3.12] gh-106584: Fix exit code for unittest in Python 3.12 (GH-106588) (#109725)

gh-106584: Fix exit code for unittest in Python 3.12 (GH-106588)
(cherry picked from commit 8fc071345b50dd3de61ebeeaa287ccef21d061b2)

Co-authored-by: EliseevEgor <egor.eliseev@jetbrains.com>
Co-authored-by: sunmy2019 <59365878+sunmy2019@users.noreply.github.com>
Co-authored-by: Nikita Sobolev <mail@sobolevn.me>