[lldb] Rollback to using i386 for the watch simulator

I switched the watch simulator test from i386 to using x86_64, but
apparently that's not supported on the bots. Rollback to using i386 and
solve the original issue by passing the target, similar to what I did
in TestSimulatorPlatform.py.

GitOrigin-RevId: e3bb1c80fe68110f6362af0413c04cd77a05fbac
1 file changed