fix: add python cmd when python3 is present

mentioned in commit d7f3b951

mentioned in merge request Orange-OpenSource/k8s-tz/tools/glauth-config-generator!431 (merged)

mentioned in merge request Orange-OpenSource/lfn/ci_cd/chained-ci-py!381 (merged)

mentioned in merge request Orange-OpenSource/k8s-tz/tools/kube-score-lint!425 (merged)

mentioned in merge request euri10/yatg!96

mentioned in merge request to-be-continuous/samples/python-uv-pep621-with-ruff!6

mentioned in merge request Orange-OpenSource/k8s-tz/tools/glauth-config-generator!447 (merged)

mentioned in merge request Orange-OpenSource/k8s-tz/tools/kube-score-lint!436 (merged)

mentioned in merge request Orange-OpenSource/lfn/ci_cd/chained-ci-py!391 (merged)

mentioned in merge request Orange-OpenSource/k8s-tz/tools/gitlab-tokens-manager!11 (merged)

mentioned in merge request to-be-continuous/samples/python-uv-pep621-with-ruff!9 (merged)