[lldb] Skip Expression NonZeroFrame test on Windows

It is failing on our Windows on Arm bot:
https://lab.llvm.org/buildbot/#/builders/141/builds/7605

Will investigate later.

Author: DavidSpickett

lldb/test/API/commands/expression/expr-from-non-zero-frame/TestExprFromNonZeroFrame.py

@@ -7,6 +7,8 @@
 class ExprFromNonZeroFrame(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
+    # Expression fails to evaluate on Windows, for unknown reasons.
+    @skipIfWindows
     def test(self):
         """
         Tests that we can use SBFrame::EvaluateExpression on a frame