Fix ASIC check on Non-SONiC leaf fanout

[bingwang-ms]

Description of PR

Summary:
This PR is to fix an issue brought by PR #12931.

>       raise AttributeError(
            "'%s' object has no attribute '%s'" % (self.__class__, module_name)
            )
E       AttributeError: '<class 'tests.common.devices.eos.EosHost'>' object has no attribute 'facts'

The issue is because if the leaf fanout is not running SONiC, then the host has no attribute facts.
This PR addressed the issue by checking OS first and the ASIC check is bypassed if OS is not SONiC.

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• Test case(new/improvement)

Back port request

• 201911
• 202012
• 202205
• 202305
• 202311

Approach

What is the motivation for this PR?

This PR is to fix an issue caused by PR #12931.

How did you do it?

This PR addressed the issue by checking OS first and the ASIC check is bypassed if OS is not SONiC.

How did you verify/test it?

The change is verified on a physical testbed without leaf fanout running SONiC.

collected 1 item                                                                                                                                                                                      

iface_loopback_action/test_iface_loopback_action.py::test_loopback_action_basic  ^HPASSED                                                                                                          [100%]

Any platform specific information?

Mellanox platform specific.

Supported testbed topology if it's a new test case?

Not a new test case.

Documentation

[yanmo96]

LGTM

[mssonicbld]

Cherry-pick PR to 202311: #13176

[mssonicbld]

Cherry-pick PR to 202405: #13177