[serve] Fix deploy check (flagos-ai#1116)

### PR Category
Serve

### PR Types
Bug Fixes

### PR Description
Fix deploy check.

Author: cyber-pioneer

flagscale/runner/launcher/launcher_ssh.py

@@ -104,6 +104,8 @@ def _get_runner_cmd_train(
         del runner_args["enable_monitoring"]
     if "enable_gpu_health_check" in runner_args:
         del runner_args["enable_gpu_health_check"]
+    if "deploy" in runner_args:
+        del runner_args["deploy"]
     runner_args["rdzv_id"] = rdzv_id
     # runner_args["master_addr"] = master_addr
     # runner_args["master_port"] = master_port

flagscale/runner/runner_base.py

@@ -47,9 +47,11 @@ def __init__(self, config: DictConfig):
         # normalize native → native_{task_type}
         if backend_type == "native":
             backend_type = f"native_{self.task_type}"
+
+        if backend_type == "native_serve":
             if self.config.experiment.runner.get(
                 "deploy", None
-            ) is None or self.config.experiment.runner.deploy.get("use_fs_serve", False):
+            ) is None or not self.config.experiment.runner.deploy.get("use_fs_serve", False):
                 raise ValueError("config.experiment.deploy.use_fs_serve in YAML should be true")
 
         self.backend_type = backend_type