Fix CI/CD infrastructure: Replace platform-specific mkdir with universal Python command

- Replace deprecated tox platform syntax (broken in tox 4.17.0+)
- Use universal Python command for reports directory creation
- Ensures compatibility with Docker and GitHub Actions environments
- Resolves 'JUnitXML: Parent folder does not exist' error

Author: ronier83

tox.ini

@@ -39,9 +39,7 @@ deps=
 allowlist_externals=
     mkdir
 commands=
-    linux: mkdir -p reports
-    macos: mkdir -p reports
-    win: mkdir reports
+    python -c "import os; os.makedirs('reports', exist_ok=True)"
     nose2 --config=tests/ut/nose2.cfg --verbose --project-directory . {posargs}
     coverage html --fail-under=75 -d reports/coverage