[modules] Implement @@iterator on namespace objects.

test/test262/test262.status

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@@ skipping 626 matching lines @@
   'language/module-code/comment-single-line-html*': [FAIL],
 
   # v8:5486
   'language/module-code/instn-iee-star-cycle': [FAIL],
   'language/module-code/instn-named-star-cycle': [FAIL],
   'language/module-code/instn-star-star-cycle': [FAIL],
 
   # v8:5487
   'language/module-code/namespace/internals/get-own-property-str-found-uninit': [FAIL],
 
-  # @@iterator on namespace objects, to be implemented
+  # v8:5401
+  'language/module-code/namespace/internals/set': [FAIL],
   'language/module-code/namespace/internals/define-own-property': [FAIL],
-  'language/module-code/namespace/internals/get-own-property-sym': [FAIL],
-  'language/module-code/namespace/internals/get-sym-found': [FAIL],
-  'language/module-code/namespace/internals/has-property-sym-found': [FAIL],
-  'language/module-code/namespace/internals/own-property-keys-binding-types': [FAIL],
-  'language/module-code/namespace/internals/own-property-keys-sort': [FAIL],
-  'language/module-code/namespace/internals/set': [FAIL],
-  'language/module-code/namespace/Symbol.iterator/*': [FAIL],
+
+  # https://github.com/tc39/test262/issues/773
+  'language/module-code/namespace/Symbol.iterator/values-binding-types_': [SKIP],
 }],  # variant == ignition or variant == ignition_staging or variant == ignition_turbofan
 
 ]