If multiple models found by automatic_model_search select one with model's name

[pwolnows]

OpenVINO converted models (e.g., bce-embedding_base-v1) might be placed in a directory along with model parts (e.g., openvino_tokenizer and openvino_detokenizer) that are not needed for accuracy validation.
This change avoids throwing a ConfigError if, among other files, there is a model with a certain name.