Document why test is disabled on macos ventura

[aprantl]

Summary

Starting with macOS 13 CoreFoundation pulls in Foundation.

rdar://96224141

[JDevlieghere]

Thanks. LGTM!

lldb/test/API/lang/objcxx/cxx-bridged-po/TestObjCXXBridgedPO.py

 import lldb
 from lldbsuite.test.lldbtest import *
 from lldbsuite.test.decorators import *
 import lldbsuite.test.lldbutil as lldbutil
 
 class TestObjCXXBridgedPO(TestBase):
 
-    @expectedFailureAll(macos_version=[">=", "13.0"]) # rdar://96224141
+    @skipIfDarwinEmbedded
+    @skipIf(macos_version=[">=", "13.0"])
     def test_bridged_type_po(self):
         self.build()
         lldbutil.run_to_source_breakpoint(
             self, 'break here', lldb.SBFileSpec('main.mm'))
         self.expect('po num',
                     "did not get the Objective-C object description",
                     substrs=['CFNumber', '0x', '42'])
         pointer_val = str(self.frame().FindVariable('num').GetValue())
         self.expect('po '+pointer_val,
                     "did not get the Objective-C object description",
                     substrs=['CFNumber', '0x', '42'])
+
+    @skipIfDarwinEmbedded
+    @skipIf(macos_version=["<", "13.0"])
+    def test_bridged_type_po(self):
+        """Starting on macOS 13 CoreFoundation links against Foundation,
+           so we always get the Foundation object description.
+        """
+        self.build()
+        lldbutil.run_to_source_breakpoint(
+            self, 'break here', lldb.SBFileSpec('main.mm'))
+        self.expect('po num',
+                    "did not get the Objective-C object description",
+                    substrs=['42'])
+        pointer_val = str(self.frame().FindVariable('num').GetValue())
+        self.expect('po '+pointer_val,
+                    "did not get the Objective-C object description",
+                    substrs=['42'])