This is about code cleanup because logging should not cause a program to exit suddenly which is what it does now when logger.critical() is called.

Acceptance criteria:

1. Add a new logger, {{logger.critical_with_exit }}that does what the existing{{ logger.critical() }}does now.
   • Add a new LogLevel higher than 50: https://github.com/oamg/convert2rhel/blob/aeca505239d20a04e8e68d76ab8cb9751e7c7cdf/convert2rhel/logger.py#L39
   • Search logger.py for critical and add the appropriate code for critical_with_exit() there.
2. Move all existing usage of critical() in our code to critical_with_exit()
3. Rename critical_no_exit() to critical()
   • At this point, new code should use logger.critical() and should expect that the log call will not exit.
   • This should perform the find and replace:{{ find . -name '*.py' -exec sed -i s/critical_no_exit/critical/g {} \;}}