IGNITE-27908 [ducktests] Use python3.9 for ducktest checkstyle (#12764)

Author: maksaska

.github/workflows/commit-check.yml

@@ -97,7 +97,7 @@ jobs:
         cfg:
           - { python: "3.8", toxenv: "py38" }
           - { python: "3.9", toxenv: "py39" }
-          - { python: "3.8", toxenv: "codestyle" }
+          - { python: "3.9", toxenv: "codestyle" }
     steps:
       - uses: actions/checkout@v4
         with:

modules/ducktests/tests/tox.ini

@@ -17,6 +17,7 @@ envlist = codestyle, py38, py39
 skipsdist = True
 
 [testenv]
+install_command = pip install --extra-index-url https://pypi.org/simple {opts} {packages}
 envdir = {homedir}/.virtualenvs/ignite-ducktests-{envname}
 deps =
     -r ./docker/requirements-dev.txt
@@ -25,7 +26,7 @@ commands =
     pytest {env:PYTESTARGS:} {posargs}
 
 [testenv:codestyle]
-basepython = python3.8
+basepython = python3
 commands =
     flake8