Macro impl_time_zone_iana_to_bcp47_v2

macro_rules! impl_time_zone_iana_to_bcp47_v2 {
    ($ provider : ty) => { ... };
}

Implement DataProvider<IanaToBcp47MapV2Marker> on the given struct using the data hardcoded in this file. This allows the struct to be used with icu’s _unstable constructors.