Initiating a Locale/Language with empty language code/script/region results in an unreasonable locale.

[itingliu]

Here are some examples:

print(Locale(languageCode: "", script: "", languageRegion: "").identifier) // "-_"

let languageComponents = Locale.Language.Components(language: .init(identifier:""))
print(Locale(languageComponents: languageComponents).identifier) // "-Latn"

Fix this by handling empty identifiers passed in at initialization time correctly.

resolves 132353443