Support NativeLB option in GatewayAPI provider

Co-authored-by: Kevin Pollet <pollet.kevin@gmail.com>

docs/content/reference/static-configuration/cli-ref.md

@@ -801,6 +801,9 @@ Kubernetes label selector to select specific GatewayClasses.
 `--providers.kubernetesgateway.namespaces`:  
 Kubernetes namespaces.
 
+`--providers.kubernetesgateway.nativelbbydefault`:  
+Defines whether to use Native Kubernetes load-balancing by default. (Default: ```false```)
+
 `--providers.kubernetesgateway.statusaddress.hostname`:  
 Hostname used for Kubernetes Gateway status address.
 

docs/content/reference/static-configuration/env-ref.md

@@ -801,6 +801,9 @@ Kubernetes label selector to select specific GatewayClasses.
 `TRAEFIK_PROVIDERS_KUBERNETESGATEWAY_NAMESPACES`:  
 Kubernetes namespaces.
 
+`TRAEFIK_PROVIDERS_KUBERNETESGATEWAY_NATIVELBBYDEFAULT`:  
+Defines whether to use Native Kubernetes load-balancing by default. (Default: ```false```)
+
 `TRAEFIK_PROVIDERS_KUBERNETESGATEWAY_STATUSADDRESS_HOSTNAME`:  
 Hostname used for Kubernetes Gateway status address.
 

docs/content/reference/static-configuration/file.toml

@@ -158,6 +158,7 @@
     labelSelector = "foobar"
     throttleDuration = "42s"
     experimentalChannel = true
+    nativeLBByDefault = true
     [providers.kubernetesGateway.statusAddress]
       ip = "foobar"
       hostname = "foobar"

docs/content/reference/static-configuration/file.yaml

@@ -183,6 +183,7 @@ providers:
       service:
         name: foobar
         namespace: foobar
+    nativeLBByDefault: true
   rest:
     insecure: true
   consulCatalog: