Add option to change CLI behavior when parse does not consume all data

The current CLi behavior of warning when leftover data exists after a parse is unintutive. We should consider adding an option that allows the user to change the behavior when such data exists. For example --leftover-data=error/warning/ignore.

See discussion here for more motivatin and possible solutions: https://lists.apache.org/thread.html/rcf8e414ac96f090985dc79eaaba1cbd8022a163ac49f0e2c7e381843%40%3Cusers.daffodil.apache.org%3E