[lldb][test] XFAIL TestIRInterpreter.py on Windows again

I must have been mistaken because this test does still fail
on Windows on Arm. At least the test code is Windows compatible
now.

Author: DavidSpickett

lldb/test/API/commands/expression/ir-interpreter/TestIRInterpreter.py

@@ -104,8 +104,10 @@ def build_and_run(self):
 
         self.runCmd("run", RUN_SUCCEEDED)
 
-    # Works on Windows on Arm, fails on Windows on x64.
-    @skipIf(oslist=["windows"], archs=no_match(["arm64", "aarch64"]), bugnumber="http://llvm.org/pr21765")
+    @expectedFailureAll(
+        oslist=["windows"],
+        bugnumber="llvm.org/pr21765",
+    )
     @add_test_categories(["pyapi"])
     def test_ir_interpreter(self):
         self.build_and_run()