Inconsistent file type check in google/cloud/aiplatform/utils/gcs_utils.py and vertexai/evaluation/utils.py

Prior to the function call [_upload_pandas_df_to_gcs](https://github.com/googleapis/python-aiplatform/blob/86fc215cb854c006a0836a6e8f98e6d40c191fee/vertexai/evaluation/utils.py#L265) in the Evaluation module, there is a [validation logic](https://github.com/googleapis/python-aiplatform/blob/86fc215cb854c006a0836a6e8f98e6d40c191fee/vertexai/evaluation/utils.py#L263) to check whether the file type is `csv`. However, within the [_upload_pandas_df_to_gcs](https://github.com/googleapis/python-aiplatform/blob/86fc215cb854c006a0836a6e8f98e6d40c191fee/google/cloud/aiplatform/utils/gcs_utils.py#L351) function implementation, `jsonl` is the only supported file type.

At least one of the types (CSV or JSONL) should be supported across both implementations.