gh-72353: Continue reading from the console after ignored Ctrl+C (GH-155434)

If the console cancels a read because of Ctrl+C, but the SIGINT handler
does not raise an exception, restart the read instead of ending it as if
at end of file.

Co-authored-by: Valeriya Sinevich <valeriya.sinevich@phystech.edu>
Co-authored-by: Zackery Spytz <zspytz@gmail.com>