GH-47402: [CI][Dev] Fix shellcheck errors in the ci/scripts/python_test_emscripten.sh#47403

raulcd merged 3 commits into

apache:mainapache/arrow:mainfrom

hiroyuki-sato:topic/shellcheck-python_test_emscriptenhiroyuki-sato/arrow:topic/shellcheck-python_test_emscriptenCopy head branch name to clipboard