Module graceful shutdown support #22611
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Provide support for SmartSwitch DPU module graceful shutdown.
Why I did it
Please refer to the HLD and related PRs:
HLD: # 1991 sonic-net/SONiC#1991
sonic-platform-common: #567 sonic-net/sonic-platform-common#567
sonic-host-services: #255 sonic-net/sonic-host-services#255
Work item tracking
How I did it
Please refer to the HLD
How to verify it
Issue the "config chassis modules shutdown DPUx" command
Verify the DPU module is gracefully shut by checking the logs in /var/log/syslog on both NPU and DPU