[ci] fix: use local hf model path (verl-project#4299)

### What does this PR do?

As title

Author: wuxibin89

tests/workers/critic/test_special_dp_critic.py

@@ -12,7 +12,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
+import os
 import tempfile
 import unittest
 from unittest.mock import Mock, patch
@@ -60,7 +60,8 @@ def setUp(self):
         self.device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
         self.temp_dir = tempfile.mkdtemp()
 
-        config = AutoConfig.from_pretrained("Qwen/Qwen2.5-0.5B-Instruct")
+        model_path = os.path.expanduser("~/models/Qwen/Qwen2.5-0.5B-Instruct")
+        config = AutoConfig.from_pretrained(model_path)
         config.save_pretrained(self.temp_dir)
 
         self.config = FSDPCriticConfig(
@@ -76,8 +77,8 @@ def setUp(self):
             rollout_n=1,
             optim=FSDPOptimizerConfig(lr=1e-6),
             model=FSDPCriticModelCfg(
-                path="Qwen/Qwen2.5-0.5B-Instruct",
-                tokenizer_path="Qwen/Qwen2.5-0.5B-Instruct",
+                path=model_path,
+                tokenizer_path=model_path,
                 fsdp_config=FSDPEngineConfig(fsdp_size=-1),
                 use_remove_padding=False,
             ),

tests/workers/test_fsdp_workers.py

@@ -25,9 +25,11 @@ def test_actor_rollout_ref_worker_actor_ref_model():
     os.environ["MASTER_ADDR"] = "127.0.0.1"
     os.environ["MASTER_PORT"] = "8888"
 
-    config_str = """
+    actor_model_path = os.path.expanduser("~/models/Qwen/Qwen2.5-0.5B-Instruct")
+    ref_model_path = os.path.expanduser("~/models/Qwen/Qwen2.5-1.5B-Instruct")
+    config_str = f"""
     model:
-      path: Qwen/Qwen2.5-0.5B-Instruct
+      path: {actor_model_path}
     actor:
       _target_: verl.workers.config.FSDPActorConfig
       strategy: fsdp
@@ -45,7 +47,7 @@ def test_actor_rollout_ref_worker_actor_ref_model():
             stack_depth: 32
     ref:
       model:
-        path: Qwen/Qwen2.5-1.5B-Instruct
+        path: {ref_model_path}
       fsdp_config:
         _target_: verl.workers.config.FSDPEngineConfig
         fsdp_size: -1