[Mellanox][Smartswitch] Add no_wait option for dpu reboot and add platform information parsing

[gpunathilell]

Why I did it

Changes for dpuctlplat.py:

• Added option to invoke systemctl rshim start/stop from the pmon container (Using dbus)
• Added no_wait option for reboot (Since we do not need to wait for the dpu to be ready if NPU+DPU reboot is ongoing)
• Added platform JSON parsing for rshim and pcie information

Work item tracking

• Microsoft ADO (number only):

How I did it

Changed dpuctlplat.py to support systemctl commands from pmon container using the dbus-send command

How to verify it

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205
• 202211
• 202305

Tested branch (Please provide the tested image version)

Description for the changelog

Link to config_db schema for YANG module changes

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