T7999: VPP add support iavf driver

Add support the iavf driver (virtual function)

Author: sever-sever

python/vyos/vpp/config_verify.py

@@ -167,10 +167,20 @@ def verify_dev_driver(iface_name: str, driver_type: str) -> bool:
         'vmxnet3',
     ]
 
+    # Community-tested / not officially supported by VyOS
+    community_drivers_dpdk: list[str] = [
+        'iavf',
+    ]
+
     driver: str = get_eth_driver(iface_name)
 
     if driver_type == 'dpdk':
         if driver in drivers_dpdk:
+            # Warning for community drivers
+            if driver in community_drivers_dpdk:
+                Warning(
+                    f"Driver '{driver}' on interface {iface_name} is community-supported and not tested by VyOS"
+                )
             return True
     elif driver_type == 'xdp':
         if driver in drivers_xdp: