[lldb][Test][Windows] Fix flaky address range API tests

The new tests added in llvm#92014 have been flaky on Linaro's
Windows on Arm bot. They appear to be hitting a deadlock trying
to clean up the test process.

This only happens in async mode and I don't see why this test
case needs async mode, so the simple workaround is to stick to
sync mode.

Author: DavidSpickett

lldb/test/API/python_api/address_range/TestAddressRange.py

@@ -15,8 +15,6 @@ def setUp(self):
         self.build()
         exe = self.getBuildArtifact("a.out")
 
-        self.dbg.SetAsync(True)
-
         self.target = self.dbg.CreateTarget(exe)
         self.assertTrue(self.target, VALID_TARGET)
         self.launch_info = self.target.GetLaunchInfo()