[Bug]: snappi-multidut: MultiDUTParams doesn't have an attribute: duthost3

[rraghav-cisco]

Issue Description

When running the test: snappi_tests/multidut/bgp/test_bgp_outbound_tsa.py::test_dut_configuration seeing this problem:

04/09/2024 21:21:05 __init__._log_sep_line                   L0170 INFO   | ==================== snappi_tests/multidut/bgp/test_bgp_outbound_tsa.py::test_dut_configuration call ====================
04/09/2024 21:21:05 __init__.pytest_runtest_call             L0040 ERROR  | Traceback (most recent call last):
  File "/usr/local/lib/python3.8/dist-packages/_pytest/python.py", line 1761, in runtest
    self.ihook.pytest_pyfunc_call(pyfuncitem=self)
  File "/usr/local/lib/python3.8/dist-packages/pluggy/_hooks.py", line 493, in __call__
    return self._hookexec(self.name, self._hookimpls, kwargs, firstresult)
  File "/usr/local/lib/python3.8/dist-packages/pluggy/_manager.py", line 115, in _hookexec
    return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  File "/usr/local/lib/python3.8/dist-packages/pluggy/_callers.py", line 113, in _multicall
    raise exception.with_traceback(exception.__traceback__)
  File "/usr/local/lib/python3.8/dist-packages/pluggy/_callers.py", line 77, in _multicall
    res = hook_impl.function(*args)
  File "/usr/local/lib/python3.8/dist-packages/_pytest/python.py", line 192, in pytest_pyfunc_call
    result = testfunction(**testargs)
  File "/data/tests/snappi_tests/multidut/bgp/test_bgp_outbound_tsa.py", line 77, in test_dut_configuration
    run_dut_configuration(snappi_extra_params)
  File "/data/tests/snappi_tests/multidut/bgp/files/bgp_outbound_helper.py", line 38, in run_dut_configuration
    duthost3 = snappi_extra_params.multi_dut_params.duthost3
AttributeError: 'MultiDUTParams' object has no attribute 'duthost3'

@sdszhang , @selldinesh , @kamalsahu0001 , @abdosi : FYI.