8079441: Intermittent failures on Windows with "Unexpected exit from test [exit code: 1080890248]" (0x406d1388)

Do not raise (windows thread name) exception 0x406d1388 when no debugger is attached.

Reviewed-by: iklam, stuefe

hotspot/src/os/windows/vm/os_windows.cpp

@@ -778,6 +778,11 @@ void os::set_native_thread_name(const char *name) {
   // is already attached to a debugger; debugger must observe
   // the exception below to show the correct name.
 
+  // If there is no debugger attached skip raising the exception
+  if (!IsDebuggerPresent()) {
+    return;
+  }
+
   const DWORD MS_VC_EXCEPTION = 0x406D1388;
   struct {
     DWORD dwType;     // must be 0x1000