[lldb] Un-XFAIL TestStepScripted.test_misspelled_plan_name

XFAIL in llvm#96894 was too wide. This one actually passes.

Author: labath

lldb/test/API/functionalities/step_scripted/TestStepScripted.py

@@ -45,7 +45,6 @@ def step_out_with_scripted_plan(self, name):
         stop_desc = thread.GetStopDescription(1000)
         self.assertIn("Stepping out from", stop_desc, "Got right description")
 
-    @expectedFailureAll()
     def test_misspelled_plan_name(self):
         """Test that we get a useful error if we misspell the plan class name"""
         self.build()