[ZTP]config-setup adds error log due to failed yang validation on the first boot after a fresh image installation when ZTP is enabled

[gpunathilell]

This issue is caused when we perform a new image installation (through ONIE), once the image is installed if ZTP is enabled and the /etc/sonic/config_db.json is absent in the image, the config-setup generates ztp_config.json

sonic-buildimage/files/image_config/config-setup/config-setup

Line 269 in 39e2131

generate_config ztp ${TMP_ZTP_CONFIG_DB_JSON}

sonic-buildimage/files/image_config/config-setup/config-setup

Line 213 in 39e2131

/usr/lib/ztp/ztp-profile.sh create ${DEST_FILE}

This configuration contains the ZTP key
https://github.com/sonic-net/sonic-ztp/blob/b4cdd8c58bc419f37b91e783b357bff4c5174536/src/usr/lib/ztp/templates/ztp-config.j2#L41
Once this config is added and we perform config reload with this:

sonic-buildimage/files/image_config/config-setup/config-setup

Line 270 in 39e2131

reload_configdb ${TMP_ZTP_CONFIG_DB_JSON}

The config reload calls db_migrator which has the config_validator
https://github.com/sonic-net/sonic-utilities/blob/3aec51927b06fd8cce2d71adec0ec5ad7f2abf53/scripts/db_migrator.py#L1317
https://github.com/sonic-net/sonic-utilities/blob/a5b7a904663a14b781a864f7354065fbec767fe1/scripts/config_validator.py#L39
Which causes the log error:
2025 Jan 14 19:20:26.658286 sonic ERR config_validator.py: Tables without yang models: {'ZTP': {'mode': {'inband': 'true', 'ipv4': 'true', 'ipv6': 'true', 'out-of-band': 'true', 'product-name': 'XXXX', 'profile': 'active', 'serial-no': 'XXXXXXXXXXX'}}}

Steps to Reproduce

• Build image with ENABLE_ZTP=y
• onie_install the image
• Confirm ztp is enabled using ztp status -c
• Log error is present in the syslog