[Intl] Change order of "currency" and "unit" validation.

Fix changes caused by pull/75
Fix skeleton to unit code which missed the case of ...-per-percent.

https://github.com/tc39/proposal-unified-intl-numberformat/pull/75

Bug: v8:10112
Change-Id: I06f4668894c95234f36944cf3dcf2b8dbafb8b8c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2032713Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66073}

test/test262/test262.status

@@ -552,11 +552,6 @@
   'intl402/NumberFormat/prototype/formatToParts/signDisplay-ko-KR': [FAIL],
   'intl402/NumberFormat/prototype/formatToParts/signDisplay-zh-TW': [FAIL],
 
-  # Intl.NumberFormat constructor should throw RangeError
-  # https://bugs.chromium.org/p/v8/issues/detail?id=10112
-  'intl402/NumberFormat/constructor-order': [FAIL],
-  'intl402/NumberFormat/constructor-unit': [FAIL],
-
   ######################## NEEDS INVESTIGATION ###########################
 
   # https://bugs.chromium.org/p/v8/issues/detail?id=7833