LibJS: Use TimeZoneMethods in GetOffsetNanosecondsFor

Update to the latest version of the spec which was refactored to use
time zone methods record. This requires updating a whole bunch of
callers to pass through a record too.

This also ends up improving exceptions on a missing
getOffsetNanosecondsFor method.

Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainTime/PlainTime.from.js

@@ -53,7 +53,7 @@ describe("errors", () => {
         const zonedDateTime = new Temporal.ZonedDateTime(0n, {});
         expect(() => {
             Temporal.PlainTime.from(zonedDateTime);
-        }).toThrowWithMessage(TypeError, "null is not a function");
+        }).toThrowWithMessage(TypeError, "getOffsetNanosecondsFor is undefined");
     });
 
     test("string must not contain a UTC designator", () => {