T7181: VPP Static and dynamic NAT

New CLI for static and dynamic NAT:
```
set vpp nat44 interface outside <interface>                     # multi
set vpp nat44 interface inside <interface>                      # multi
set vpp nat44 address-pool translation interface <interface>    # multi
set vpp nat44 address-pool translation address <address>        # multi
set vpp nat44 address-pool twice-nat interface <interface>      # multi
set vpp nat44 address-pool twice-nat address <address>                  # multi

set vpp nat44 static rule <rule> external address <address>
set vpp nat44 static rule <rule> external port <port>
set vpp nat44 static rule <rule> local address <address>
set vpp nat44 static rule <rule> local port <port>
set vpp nat44 static rule <rule> protocol <protocol>
set vpp nat44 static rule <rule> options twice-nat
set vpp nat44 static rule <rule> options self-twice-nat
set vpp nat44 static rule <rule> options out-to-in-only
set vpp nat44 static rule <rule> options twice-nat-address <address>

set vpp nat44 exclude rule <rule> protocol <protocol>
set vpp nat44 exclude rule <rule> local-port <port>
set vpp nat44 exclude rule <rule> local-address <address>
set vpp nat44 exclude rule <rule> external-interface <interface>
```
Settings:
```
set vpp settings nat44 session-limit <limit>            # default 64512
set vpp settings nat44 timeout udp <sec>                # default 300
set vpp settings nat44 timeout tcp-established <sec>    # default 7440
set vpp settings nat44 timeout tcp-transitory <sec>     # default 240
set vpp settings nat44 timeout icmp <sec>               # default 60
set vpp settings nat44 workers <list>
set vpp settings nat44 no-forwarding
```

1 files changed, 0 insertions, 119 deletions

diff --git a/src/conf_mode/vpp_nat_source.py b/src/conf_mode/vpp_nat_source.py
deleted file mode 100644
index 40b16a3c8..000000000
--- a/src/conf_mode/vpp_nat_source.py
+++ /dev/null
@@ -1,119 +0,0 @@
-#!/usr/bin/env python3
-#
-# Copyright (C) 2025 VyOS Inc.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-from vyos.config import Config
-from vyos import ConfigError
-from vyos.vpp.nat.nat44 import Nat44
-
-
-def get_config(config=None) -> dict:
-    if config:
-        conf = config
-    else:
-        conf = Config()
-
-    base = ['vpp', 'nat44', 'source']
-
-    # Get config_dict with default values
-    config = conf.get_config_dict(
-        base,
-        key_mangling=('-', '_'),
-        get_first_key=True,
-        no_tag_node_value_mangle=True,
-        with_defaults=True,
-        with_recursive_defaults=True,
-    )
-
-    # Get effective config as we need full dicitonary per interface delete
-    effective_config = conf.get_config_dict(
-        base,
-        key_mangling=('-', '_'),
-        effective=True,
-        get_first_key=True,
-        no_tag_node_value_mangle=True,
-    )
-
-    if not config:
-        config['remove'] = True
-
-    if effective_config:
-        config.update({'effective': effective_config})
-
-    return config
-
-
-def verify(config):
-    if 'remove' in config:
-        return None
-
-    required_keys = {'inside_interface', 'outside_interface'}
-    if not all(key in config for key in required_keys):
-        missing_keys = required_keys - set(config.keys())
-        raise ConfigError(
-            f"Required options are missing: {', '.join(missing_keys).replace('_', '-')}"
-        )
-
-    if not config.get('translation', {}).get('address'):
-        raise ConfigError('Translation requires address')
-
-    if config.get('translation', {}).get('address') == 'masquerade':
-        raise ConfigError('Masquerade is not implemented')
-
-
-def generate(config):
-    pass
-
-
-def apply(config):
-    # Delete NAT source
-    if 'effective' in config:
-        remove_config = config.get('effective')
-        interface_in = remove_config.get('inside_interface')
-        interface_out = remove_config.get('outside_interface')
-        translation_address = remove_config.get('translation', {}).get('address')
-
-        n = Nat44(interface_in, interface_out, translation_address)
-        n.delete_nat44_out_interface()
-        n.delete_nat44_interface_inside()
-        n.delete_nat44_address_range()
-
-    if 'remove' in config:
-        return None
-
-    # Add NAT44
-    interface_in = config.get('inside_interface')
-    interface_out = config.get('outside_interface')
-    translation_address = config.get('translation', {}).get('address')
-
-    n = Nat44(interface_in, interface_out, translation_address)
-    n.enable_nat44_ed()
-    n.enable_nat44_forwarding()
-    n.add_nat44_out_interface()
-    # n.add_nat44_interface_inside()
-    n.add_nat44_address_range()
-
-
-if __name__ == '__main__':
-    try:
-        c = get_config()
-        verify(c)
-        generate(c)
-        apply(c)
-    except ConfigError as e:
-        print(e)
-        exit(1)