Improve load_mingraph to wait eth0 restart before exit

[liuh-80]

Improve load_mingraph to wait eth0 restart before exit

Why I did it

load_minigraph will restart eth0, which cause device randomly lost network for 10-20 seconds after load_minigraph
When enable TACACS, this will cause commands randomly failed after load_minigraph

How I did it

Wait interfaces-config and networking service restart after restart all sonic.target services.

Work item tracking

• Microsoft ADO: 28302676

How to verify it

Pass all test case.
Add new test case.

Manually check on test device:

admin@TEST_DEVICE:~$ date && sudo config load_minigraph -y && date
Wed Jun 12 08:30:59 AM UTC 2024
Stopping SONiC target ...
Running command: /usr/local/bin/sonic-cfggen -H -m -j /etc/sonic/init_cfg.json --write-to-db
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
Running command: config qos reload --no-dynamic-buffer --no-delay
Running command: /usr/local/bin/sonic-cfggen -d --write-to-db -t /usr/share/sonic/device/x86_64-mlnx_msn2700-r0/Mellanox-SN2700-D48C8/buffers.json.j2,config-db -t /usr/share/sonic/device/x86_64-mlnx_msn2700-r0/Mellanox-SN2700-D48C8/qos.json.j2,config-db -y /etc/sonic/sonic_version.yml
Buffer calculation model updated, restarting swss is required to take effect
Running command: pfcwd start_default
Restarting SONiC target ...
Enabling container monitoring ...
Reloading Monit configuration ...
Reinitializing monit daemon
Please note setting loaded from minigraph will be lost after system reboot. To preserve setting, run `config save`.
Wed Jun 12 08:32:17 AM UTC 2024
admin@TEST_DEVICE:~$


In syslog, eth0 restart before load_minigraph finish:

2024 Jun 12 08:31:50.743828 TEST_DEVICE INFO systemd-networkd[358]: eth0: Link DOWN
2024 Jun 12 08:31:50.743957 TEST_DEVICE INFO systemd-networkd[358]: eth0: Lost carrier

2024 Jun 12 08:31:58.182663 TEST_DEVICE INFO interfaces-config.sh[15321]: net.ipv6.conf.eth0.accept_ra_defrtr = 0
2024 Jun 12 08:31:58.182777 TEST_DEVICE INFO interfaces-config.sh[15321]: net.ipv6.conf.eth0.accept_ra = 0
2024 Jun 12 08:31:58.182838 TEST_DEVICE INFO interfaces-config.sh[15321]: net.ipv6.conf.eth0.ra_defrtr_metric = 1996489704

2024 Jun 12 08:32:08.572423 TEST_DEVICE INFO systemd-networkd[358]: eth0: Link UP

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

• 202305
• 202311
• 202405

Tested branch (Please provide the tested image version)

will updated with this PR image later.

• SONiC.202305.562827-f73bc5bfb
• SONiC.202311.562838-e1f4859bf

Description for the changelog

Improve load_mingraph to wait eth0 restart before exit

A picture of a cute animal (not mandatory but encouraged)

[liuh-80]

Need sonic-mgmt PR merge first:
sonic-net/sonic-mgmt#13277

Even without this PR, the sonic-mgmt PR still necessary.

[liuh-80]

Found a test case issue, need following PR merge first: sonic-net/sonic-mgmt#13302

[liuh-80]

Verified with this POC PR: sonic-net/sonic-buildimage#19281, all test case passed

[liuh-80]

cherry-pick PR for 202305: #3371

[liuh-80]

Cherry-pick PR for 202311: #3372

[mssonicbld]

Cherry-pick PR to 202405: #3464