add unknown to DateTimeFormatTypes (#50402)

* add unknown to DateTimeFormatTypes

* move unknown to es2019.intl instead

* Accepted baselines.

Co-authored-by: long.ho <long.ho@cloudkitchens.com>

src/compiler/commandLineParser.ts

@@ -67,6 +67,7 @@ namespace ts {
         ["es2019.object", "lib.es2019.object.d.ts"],
         ["es2019.string", "lib.es2019.string.d.ts"],
         ["es2019.symbol", "lib.es2019.symbol.d.ts"],
+        ["es2019.intl", "lib.es2019.intl.d.ts"],
         ["es2020.bigint", "lib.es2020.bigint.d.ts"],
         ["es2020.date", "lib.es2020.date.d.ts"],
         ["es2020.promise", "lib.es2020.promise.d.ts"],