[action] [PR:3439] Remove update of mgmt oper status in swss

[mssonicbld]

What I did
Issue to be fix: Currently operational status of mgmt interface is not present or correct for multi-asic devices.

Why I did it
Initial PR that added mgmt oper status feature in swss: sonic-net/sonic-swss#630
sonic-net/sonic-buildimage#21245 adds a script to update oper status of management interface periodically. In doing so, we no longer need to update oper status of mgmt interface in swss.

How I verified it
Verified on single-asic platform

1. verified on single-asic platform and multi-asic Chassis platfrom.
   Single ASIC Arista device verification along with Add script to periodically update oper status of management interface sonic-net/sonic-buildimage#21245 changes
   Ran the below bash script to verify the state of STATE_DB: MGMT_OPER_STATUS table and also execute config_reload, verify if STATE_DB is flushed out and repopulated after monit starts periodic script.

#!/bin/bash
CUR_STATUS=`sonic-db-cli STATE_DB hgetall "MGMT_PORT_TABLE|eth0"`
echo "current status in STATE_DB is $CUR_STATUS :: expected to have up state"
snmp_result=`docker exec snmp snmpwalk -v2c -c <comm> <IP> 1.3.6.1.2.1.2.2.1.8.10000`
echo "snmp result  before config reload 5min $snmp_result :: expected to have 1 in snmp result"
sudo config reload -y
CUR_STATUS=`sonic-db-cli STATE_DB hgetall "MGMT_PORT_TABLE|eth0"`
echo "current status in STATE_DB after config_reload is $CUR_STATUS :: expected to have empty"
# sleep for snmp to start
sleep 60
snmp_result=`docker exec snmp snmpwalk -v2c -c <comm> <IP> 1.3.6.1.2.1.2.2.1.8.10000`
echo "snmp result  after config reload $snmp_result :: expected to return error since STATE_DB is not yet populated"
# monit will populate mgmt oper status after each 5min cycle
sleep 240
CUR_STATUS=`sonic-db-cli STATE_DB hgetall "MGMT_PORT_TABLE|eth0"`
echo "current status in STATE_DB after config_reload after 5min $CUR_STATUS :: expected to have up state"
snmp_result=`docker exec snmp snmpwalk -v2c -c <comm> <IP> 1.3.6.1.2.1.2.2.1.8.10000`
echo "snmp result  after config reload after 5min $snmp_result :: expected to have 1 in snmp result"

Result of above script:

current status in STATE_DB is {'oper_status': 'up'} :: expected to have up state
snmp result  before config reload 5min iso.3.6.1.2.1.2.2.1.8.10000 = INTEGER: 1 :: expected to have 1 in snmp result
Acquired lock on /etc/sonic/reload.lock
Disabling container and routeCheck monitoring ...
Stopping SONiC target ...
Running command: /usr/local/bin/sonic-cfggen -j /etc/sonic/init_cfg.json -j /etc/sonic/config_db.json --write-to-db
Running command: /usr/local/bin/db_migrator.py -o migrate
Running command: /usr/local/bin/sonic-cfggen -d -y /etc/sonic/sonic_version.yml -t /usr/share/sonic/templates/sonic-environment.j2,/etc/sonic/sonic-environment
Restarting SONiC target ...
Enabling container and routeCheck monitoring ...
Reloading Monit configuration ...
Reinitializing monit daemon
Released lock on /etc/sonic/reload.lock
current status in STATE_DB after config_reload is {} :: expected to have empty
snmp result  after config reload iso.3.6.1.2.1.2.2.1.8.10000 = No Such Object available on this agent at this OID :: expected to return error since STATE_DB is not yet populated
current status in STATE_DB after config_reload after 5min {'oper_status': 'up'} :: expected to have up state
snmp result  after config reload after 5min iso.3.6.1.2.1.2.2.1.8.10000 = INTEGER: 1 :: expected to have 1 in snmp result

Details if related

[mssonicbld]

Original PR: sonic-net/sonic-swss#3439