[lldb] Skip TestVSCode_launch.test_progress_events on linux

It's flaky everywhere, not just arm.

lldb/test/API/tools/lldb-vscode/launch/TestVSCode_launch.py

@@ -454,7 +454,7 @@ class TestVSCode_launch(lldbvscode_testcase.VSCodeTestCaseBase):
 
     @skipIfWindows
     @skipIfRemote
-    @skipIf(oslist=["linux"], archs=["arm"])
+    @skipIf(oslist=["linux"])
     def test_progress_events(self):
         '''
             Tests the progress events to ensure we are receiving them.