ICU 74.1 74.1

### - _ -

- _countAvailableSources() : icu::Transliterator
- _countAvailableTargets() : icu::Transliterator
- _countAvailableVariants() : icu::Transliterator
- _getAvailableSource() : icu::Transliterator
- _getAvailableTarget() : icu::Transliterator
- _getAvailableVariant() : icu::Transliterator
- _registerAlias() : icu::Transliterator
- _registerFactory() : icu::Transliterator
- _registerInstance() : icu::Transliterator
- _registerSpecialInverse() : icu::Transliterator