fix(pyspark): ensure that the output of zip matches the expected ibis…

… schema

ibis/backends/pyspark/compiler.py

@@ -349,7 +349,7 @@ def visit_MapGet(self, op, *, arg, key, default):
             return self.if_(self.f.map_contains_key(arg, key), arg[key], default)
 
     def visit_ArrayZip(self, op, *, arg):
-        return self.f.arrays_zip(*arg)
+        return self.cast(self.f.arrays_zip(*arg), op.dtype)
 
     def visit_ArrayMap(self, op, *, arg, body, param):
         param = sge.Identifier(this=param)