Add scope to field validator.

[xincunli-sonic]

What I did

This is for fix issue:sonic-net/sonic-buildimage#20379

How I did it

For field_operation_validators, add scope if need read state_db.

How to verify it

admin@str2-7250-lc1-2:~$ sonic-db-cli STATE_DB -n asic0 hget "PORT_TABLE|Ethernet0" supported_fecs
none,rs

admin@str2-7250-lc1-2:~$ cat fec.json 
[
    {
        "op": "add",
        "path": "/asic0/PORT/Ethernet0/fec",
        "value": "fc"
    }
]

admin@str2-7250-lc1-2:~$ sudo config apply-patch fec.json 
Patch Applier: asic0: Patch application starting.
Patch Applier: asic0: Patch: [{"op": "add", "path": "/PORT/Ethernet0/fec", "value": "fc"}]
Patch Applier: asic0 getting current config db.
Patch Applier: asic0: simulating the target full config after applying the patch.
Patch Applier: asic0: validating all JsonPatch operations are permitted on the specified fields
Failed to apply patch due to: Failed to apply patch on the following scopes:
- asic0: Modification of PORT table is illegal- validating function generic_config_updater.field_operation_validators.port_config_update_validator returned False
Usage: config apply-patch [OPTIONS] PATCH_FILE_PATH
Try "config apply-patch -h" for help.

Error: Failed to apply patch on the following scopes:
- asic0: Modification of PORT table is illegal- validating function generic_config_updater.field_operation_validators.port_config_update_validator returned False

Previous command output (if the output of a command-line utility has changed)

New command output (if the output of a command-line utility has changed)

[wen587]

This is a temp function, should we define the self.scope outside this?