Fix ssdhealth failure on multi-asic VS platform

[vivekrnv]

What I did

show platform ssdhealth is failing on multi asic vs platform

E sys.exit(cli())
E ^^^^^
E File "/usr/local/lib/python3.11/dist-packages/click/core.py", line 764, in call
E return self.main(*args, **kwargs)
E ^^^^^^^^^^^^^^^^^^^^^^^^^^
E File "/usr/local/lib/python3.11/dist-packages/click/core.py", line 717, in main
E rv = self.invoke(ctx)
E ^^^^^^^^^^^^^^^^
E File "/usr/local/lib/python3.11/dist-packages/click/core.py", line 1137, in invoke
E return _process_result(sub_ctx.command.invoke(sub_ctx))
E ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E File "/usr/local/lib/python3.11/dist-packages/click/core.py", line 1137, in invoke
E return _process_result(sub_ctx.command.invoke(sub_ctx))
E ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E File "/usr/local/lib/python3.11/dist-packages/click/core.py", line 956, in invoke
E return ctx.invoke(self.callback, **ctx.params)
E ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E File "/usr/local/lib/python3.11/dist-packages/click/core.py", line 555, in invoke
E return callback(*args, **kwargs)
E ^^^^^^^^^^^^^^^^^^^^^^^^^
E File "/usr/local/lib/python3.11/dist-packages/show/platform.py", line 117, in ssdhealth
E device = platform_data.get("chassis", {}).get("disk", {}).get("device", None)
E ^^^^^^^^^^^^^^^^^
E AttributeError: 'NoneType' object has no attribute 'get'

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mssonicbld]

Cherry-pick PR to 202411: #3744