[simplify] Introduce new verbose_output method
[simplify] Introduce new verbose_output method

Use a new verbose_output method instead of several
"if pywikibot.config.verbose_output" statements

detached from I4ef9009c91e

Change-Id: I939ba830222a1ea09c4d3503cc0dc38b51d44a07

PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core,wikimedia/pywikibot-core