Disable two new tests on Windows. They are failing but the logs are not helpful.

Also turn on the command trace unconditionally for TestThreadPlanCommands.py as the
tests for the Ubuntu bot don't seem to run with -t making it hard to see why this is
failing remotely.

lldb/test/API/functionalities/plugins/python_os_plugin/stepping_plugin_threads/TestOSPluginStepping.py

@@ -8,6 +8,7 @@ from __future__ import print_function
 
 import os
 import lldb
+from lldbsuite.test.decorators import *
 from lldbsuite.test.lldbtest import *
 import lldbsuite.test.lldbutil as lldbutil
 
@@ -17,6 +18,7 @@ class TestOSPluginStepping(TestBase):
     mydir = TestBase.compute_mydir(__file__)
     NO_DEBUG_INFO_TESTCASE = True
 
+    @skipIfWindows
     def test_python_os_plugin(self):
         """Test that stepping works when the OS Plugin doesn't report all
            threads at every stop"""
@@ -24,6 +26,7 @@ class TestOSPluginStepping(TestBase):
         self.main_file = lldb.SBFileSpec('main.cpp')
         self.run_python_os_step_missing_thread(False)
 
+    @skipIfWindows
     def test_python_os_plugin_prune(self):
         """Test that pruning the unreported PlanStacks works"""
         self.build()