text: Title: Incorrect type annotations for untyped JSON schema arrays
  Body: **Describe the bug**
  
  When a JSON schema field is declared as `"type": "array"` with no further details, the generated data model code fails typechecking:
  
  ```
  src/_models/__init__.py:1990: error: Missing type parameters for generic type "List"  [type-arg]
  src/_models/__init__.py:1991: error: Missing type parameters for generic type "List"  [type-arg]
  ```
  
  **To Reproduce**
  
  Example schema snippet:
  ```json
      "system/rpc/listDownloadedModels/returns": {
        "type": "array"
      },
  ```
  
  Used commandline:
  ```
  $ datamodel-codegen --input /path/to/schema.json --input-file-type jsonschema --output /path/to/src/_models/__init__.py \
      --output-model-type pydantic_v2.BaseModel --use-annotated --use-union-operator
  ```
  
  The generated model that fails typechecking:
  
  ```python
  class SystemRpcListDownloadedModelsReturns(RootModel[List]):
      root: List
  ```
  
  **Expected behavior**
  
  Untyped arrays should be effectively typed as `List[Any]` rather than `List`
  
  **Version:**
   - OS: Linux
   - Python version: 3.12
   - datamodel-code-generator version: 0.26.3
  
  **Additional context**
  
  `--use-generic-container-types` just shifted the error to complaining about `Sequence` instead.
  
  `--use-standard-collections` crashed `mypy` outright, so I didn't investigate that any further.
  
  The offending schema field not having any type information at all regarding the permitted elements is probably a bug in its own right, but not one that has anything to do with datamodel-code-generator.
  