test_zipimport.py skip testUnencodable until posix NFI based support is in

Author: cosminbasca

graalpython/lib-python/3/test/test_zipimport.py

@@ -644,6 +644,7 @@ def testTraceback(self):
         files = {TESTMOD + ".py": (NOW, raise_src)}
         self.doTest(None, files, TESTMOD, call=self.doTraceback)
 
+    @support.impl_detail("[GR-27024] [GR-23324] posix NFI support", graalvm=False)
     @unittest.skipIf(support.TESTFN_UNENCODABLE is None,
                      "need an unencodable filename")
     def testUnencodable(self):