[action] [PR:818] [PMON] Bmcctld improvements & thermalctld: push thermals from Switch-Host --> BMC

[mssonicbld]

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Changes in this PR

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Fixes issue: sonic-net/sonic-platform-daemons#824

sonic-bmcctld/scripts/bmcctld

• Conditional SWITCH_HOST_POWER_ON_DELAY - applied only on REBOOT_CAUSE_POWER_LOSS; skipped on warm/fast/soft reboot.
• GracefulShutdownHandler.execute() cleaned up
• Event-log de-duplication across handler functions
• Rack manager alert : skip when incoming alert matches to existing alert level, prevents unnecessary pub/sub events
• chassis module admin_status : skip when admin_status don't change, prevents unnecessary pub/sub events
• Uses self.chassis.is_liquid_cooled() platform API.
• Update the init_host_state API to derive the device_power_state from get_oper_status platform API which will either ONLINE/OFFLINE.
• Set the default graceful_shutdown_timeout = 0 till we support GNOI graceful shutdown

sonic-thermalctld/scripts/thermalctld

• EventLogger class added - stores critical events to syslog and /host/bmc/event.log.
• Switch-Host ↔ BMC, thermals are pushed to BMC, via TEMPERATURE_INFO_STATE_DB table
  - critical temperature breaches logged into BMC event log.
• LiquidCoolingUpdater improvements:
  - writes SYSTEM_LEAK_STATUS only on transitions
  - Per-sensor state updates also only on transitions
• Added the Leak severity escalation logic (MINOR → CRITICAL after max_minor_duration_sec).
• Critical leaks logged via event_logger.
• Add logic to use self.chassis.is_liquid_cooled() also to identify liquid cooled platforms"

Signed-off-by: Sonic Build Admin sonicbld@microsoft.com

[mssonicbld]

Original PR: sonic-net/sonic-platform-daemons#818

[mssonicbld]

/azp run

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