v1: tell mypy to ignore erros with msgspec.Struct kwargs

As per the similar v0 code.

Fixes:

vllm/v1/engine/__init__.py:46: error: Unexpected keyword argument "array_like" for "__init_subclass__" of "object"  [call-arg]
vllm/v1/engine/__init__.py:46: error: Unexpected keyword argument "omit_defaults" for "__init_subclass__" of "object"  [call-arg]
vllm/v1/engine/__init__.py:46: error: Unexpected keyword argument "gc" for "__init_subclass__" of "object"  [call-arg]
vllm/v1/engine/__init__.py:58: error: Unexpected keyword argument "array_like" for "__init_subclass__" of "object"  [call-arg]
vllm/v1/engine/__init__.py:58: error: Unexpected keyword argument "omit_defaults" for "__init_subclass__" of "object"  [call-arg]
vllm/v1/engine/__init__.py:58: error: Unexpected keyword argument "gc" for "__init_subclass__" of "object"  [call-arg]

Signed-off-by: Mark McLoughlin <markmc@redhat.com>

vllm/v1/engine/__init__.py

@@ -43,10 +43,11 @@ class EngineCoreRequest:
     lora_request: Optional[LoRARequest]
 
 
-class EngineCoreOutput(msgspec.Struct,
-                       array_like=True,
-                       omit_defaults=True,
-                       gc=False):
+class EngineCoreOutput(
+        msgspec.Struct,
+        array_like=True,  # type: ignore[call-arg]
+        omit_defaults=True,  # type: ignore[call-arg]
+        gc=False):  # type: ignore[call-arg]
 
     request_id: str
     new_token_ids: List[int]
@@ -55,10 +56,11 @@ class EngineCoreOutput(msgspec.Struct,
     stop_reason: Union[int, str, None] = None
 
 
-class EngineCoreOutputs(msgspec.Struct,
-                        array_like=True,
-                        omit_defaults=True,
-                        gc=False):
+class EngineCoreOutputs(
+        msgspec.Struct,
+        array_like=True,  # type: ignore[call-arg]
+        omit_defaults=True,  # type: ignore[call-arg]
+        gc=False):  # type: ignore[call-arg]
 
     #NOTE(Nick): We could consider ways to make this more compact,
     # e.g. columnwise layout and using an int enum for finish/stop reason