Add option --log-cli-level in python-pytest-dispatch

[rodrigo-morales-1]

When writing tests, I usually display debugging information by using logging.info(...) or logging.debug(...). When --log-cli-level=debug is passed to pytest, logging.info and logging.debug messages are shown. When --log-cli-level=info is passed to pytest, logging.info messages are shown. In this pull request, I introduce changes to include --log-cli-level in python-pytest-dispatch so that users can conveniently toggle this option.

I wanted to use -l as the shortcut for setting --log-cli-level, but -l is already used in python-pytest-dispatch for setting --showlocals. For this reason, I ended up using --l.

It is worth mentioning that pytest not only defines --log-cli-level, but it also defines --log-level, --log-file-level. However, I don't know what --log-level and --log-file-level are used for. I have only used --log-cli-level because suits my use case

$ pytest --help
logging:
  --log-level=LEVEL     Level of messages to catch/display. Not set by default,
                        so it depends on the root/parent log handler's effective
                        level, where it is "WARNING" by default.
  --log-format=LOG_FORMAT
                        Log format used by the logging module
  --log-date-format=LOG_DATE_FORMAT
                        Log date format used by the logging module
  --log-cli-level=LOG_CLI_LEVEL
                        CLI logging level
  --log-cli-format=LOG_CLI_FORMAT
                        Log format used by the logging module
  --log-cli-date-format=LOG_CLI_DATE_FORMAT
                        Log date format used by the logging module
  --log-file=LOG_FILE   Path to a file when logging will be written to
  --log-file-mode={w,a}
                        Log file open mode
  --log-file-level=LOG_FILE_LEVEL
                        Log file logging level
  --log-file-format=LOG_FILE_FORMAT
                        Log format used by the logging module
  --log-file-date-format=LOG_FILE_DATE_FORMAT
                        Log date format used by the logging module
  --log-auto-indent=LOG_AUTO_INDENT
                        Auto-indent multiline messages passed to the logging
                        module. Accepts true|on, false|off or an integer.
  --log-disable=LOGGER_DISABLE
                        Disable a logger by name. Can be passed multiple times.

[wbolster]

lgtm, thanks 🚀