[mypy] Enable type checking for test directory (#5017)

tests/lora/test_lora_manager.py

@@ -1,5 +1,5 @@
 import os
-from typing import List
+from typing import Dict, List
 
 import pytest
 import torch
@@ -62,7 +62,7 @@ def test_from_lora_tensors(sql_lora_files):
 
 def create_lora(lora_id: int, model: nn.Module,
                 sub_modules: List[str]) -> LoRAModel:
-    loras = {}
+    loras: Dict[str, LoRALayerWeights] = {}
     for name in sub_modules:
         w = model.get_submodule(name).weight
         loras[name] = LoRALayerWeights(
@@ -83,7 +83,7 @@ def create_packed_lora(
     empty_replaced_module_name=None,
 ) -> LoRAModel:
     w = model.get_submodule(module_name).weight
-    loras = {}
+    loras: Dict[str, LoRALayerWeights] = {}
     for replaced_module_name in replaced_module_names:
         if replaced_module_name == empty_replaced_module_name:
             continue