[Rust Frontend] Support --lora-modules for static adapter loading (#54837)

Co-authored-by: Bugen Zhao <i@bugenzhao.com>
Signed-off-by: Will Eaton <weaton@redhat.com>
Signed-off-by: Bugen Zhao <i@bugenzhao.com>

rust/src/server/examples/external_engine_openai_qwen.rs

@@ -73,6 +73,7 @@ async fn main() -> Result<()> {
         chat_template: None,
         default_chat_template_kwargs: None,
         limit_mm_per_prompt: HashMap::new(),
+        lora_modules: Vec::new(),
         chat_template_content_format: ChatTemplateContentFormatOption::Auto,
         max_logprobs: None,
         api_server_options: ApiServerOptions::default(),