Story

When I use deprecated functions related to LanguageConverter in the Language class,
I want to use global access to LanguageConverterFactory via MediawikiServices::getInstance(),
to avoid unwanted cycle dependency between Language and LanguageConverterFactory.

Context

At the moment Language::getConverter provides access to the converter using LanguageConverterFactory injected by DI.

public function getConverter() : ILanguageConverter {
	return $this->converterFactory->getLanguageConverter( $this );
}

Expected Result

• access to factory should be implemented via MediawikiServices::getInstance()->getLanguageConverterFactory
• converterFactory should be removed
• cyclic dependency should be avoided
• LanguageConverterFactory should access $defaultLanguage as value, not closure