[AI] Collapse NativeToolBinder to a single bind() entry (#20051)

The binder doesnt need an agent or full tool context -- just a model and
options.
Single `bind(model, options)` entry!


Builds on #20022.

packages/twenty-server/src/engine/metadata-modules/ai/ai-models/services/ai-model-config.service.ts

@@ -79,15 +79,6 @@ export class AiModelConfigService {
     return tools;
   }
 
-  getNativeModelToolsForAgent(
-    model: RegisteredAiModel,
-    agent: FlatAgentWithRoleId,
-  ): ToolSet {
-    return this.getNativeModelTools(model, {
-      webSearchEnabled: agent.modelConfiguration?.webSearch?.enabled === true,
-    });
-  }
-
   private getXaiProviderOptions(agent: FlatAgentWithRoleId): ProviderOptions {
     if (
       !agent.modelConfiguration ||