LibUnicode: Move Locale enumeration from generated UCD data to CLDR data

The UCD set of data contained a very small subset of all locales just to
handle some special casing rules. This enumeration will be needed within
the CLDR generator as well. So rather than duplicate the enum, remove it
from the UCD generator in favor of the full list of locales known by the
CLDR generator.

Userland/Libraries/LibUnicode/Forward.h

@@ -13,7 +13,7 @@ namespace Unicode {
 enum class Condition : u8;
 enum class GeneralCategory : u8;
 enum class Language : u8;
-enum class Locale : u8;
+enum class Locale : u16;
 enum class Property : u8;
 enum class Script : u8;
 enum class Territory : u8;