[lldb] Skip TestConsecutiveWatchpoints.py if out of tree debugserver

The GreenDragon CI bots are currently passing because the installed
Xcode is a bit old, and doesn't have the watchpoint handling
bug that was fixed April with this test being added.

But on other CI running newer Xcode debugservers, this test will
fail.  Skip this test if we're using an out of tree debugserver.

Author: jasonmolenda

lldb/test/API/functionalities/watchpoint/consecutive-watchpoints/TestConsecutiveWatchpoints.py

@@ -22,6 +22,7 @@ def continue_and_report_stop_reason(self, process, iter_str):
 
     # debugserver only gained the ability to watch larger regions
     # with this patch.
+    @skipIfOutOfTreeDebugserver
     def test_consecutive_watchpoints(self):
         """Test watchpoint that covers a large region of memory."""
         self.build()