[ssw] adding tooling to config one single DPU

[zjswhhh]

Description of PR

Summary:
Fixes # (issue)

Sometimes load dpu config failed for DPUs in bad status. Adding a playbook to configure single DPU to avoid running the whole deploy-mg for smartswitch testbeds.

sign-off: Jing Zhang zhangjing@microsoft.com

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• New Test case
  • Skipped for non-supported platforms
• Test case improvement

Back port request

• 202205
• 202305
• 202311
• 202405
• 202411
• 202505
• 202511

Approach

What is the motivation for this PR?

Minimize effort to fix smartswitch testbeds.

How did you do it?

Add a playbook to fix single DPU.

How did you verify/test it?

changed: [xxxxxxxxxxxxxxxxxxxxxxx] => {
    "changed": true,
    "failure_count": 0,
    "invocation": {
        "module_args": {
            "host_passwords": [
                "VALUE_SPECIFIED_IN_NO_LOG_PARAMETER"
            ],
            "host_username": "admin",
            "hostname": "xxxxxxxxxxxxxxxxxxxxxxx",
            "hwsku": "Mellanox-SN4280-O28",
            "npu_index": 0,
            "target_dpu_index": 0
        }
    },
    "msg": "Successfully configured all 1 DPUs",
    "success_count": 1,
    "total_dpus": 4
}

PLAY RECAP ************************************************************************************************************************************************************************
xxxxxxxxxxxxxxxxxxxxxxx : ok=2    changed=2    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   

Any platform specific information?

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

Documentation

[mssonicbld]

/azp run

[yijingyan2]

/azp run

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