Languages with dialects aren't downloading

[serejaonly]

Describe the bug
Languages with dialects (pt-BR) aren't downloading (it might be only for Crowdin Enterprise)

To Reproduce
Steps to reproduce the behavior:

1. Set pt-BR language in the app
2. Start the app
3. See that strings aren't downloaded

Expected behavior
Expected to download it as different languages

Screenshots

Smartphone (please complete the following information):

• Device: iPhone 12 Pro
• OS: iOS 16.4

Additional context
Languages with dialects are denoted with a hyphen (pt-BR), and locales are denoted with an underscore (pt_BR).
There seems to be a confusion of these two concepts in the SDK at the stage of adding downloadable languages to CrowdinRemoteLocalisationStorage.
The final stage where the error occurs is the ManifestManager.iOSLanguageCode(for:) method, because it takes the locale code instead of the language code.

func iOSLanguageCode(for crowdinLocalization: String) -> String? {
    allLanguages.first(where: { $0.id == crowdinLocalization })?.osxLocale
}

I think it makes sense to replace the osxLocale with iOSLanguageCode to fix that.

[andrii-bodnar]

https://github.com/crowdin/mobile-sdk-ios/releases/tag/1.6.0