Add suggested replacement for \posix_isatty()

[fredden]

Per https://github.com/magento/magento2/pull/32690#discussion_r1194733290, it is recommended to use stream_isatty() instead of posix_isatty().

[sidolov]

@magento import pr to magento-commerce/magento-coding-standard repository

[m2-github-services]

@sidolov the Pull Request is successfully imported.