fix: issue2550962. remove assert in Role::hasPermission issue2550962 - Check uses of assert in roundup code. An assert was used to make sure that a classname always accompoanied an itemid in hasPermission. The Security::hasPErmission has an if clause that does the same check and raises a ValueError. Remove asserts because they ae removed when running python in optimized mode.

# 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()