fix: issue1895197 - translated help texts in admin.py not displayed correctly. Adjust the technique used to remove the translated "Usage:" prefix from the printed line. Support Chinese (zh) as well. Add coding marker so I don't have to modify the tests to skip the ones that touch the dmin module.

# https://issues.roundup-tracker.org/issue2551278
# datetime.utcnow deprecated
try:
    from datetime import UTC, datetime

    def utcnow():
        return datetime.now(UTC)

except ImportError:
    from datetime import datetime

    def utcnow():
        return datetime.utcnow()