common : fix duplicated file name with hf_repo and hf_file

[ngxson]

Currently, when using hf_repo and hf_file, the local file path is automatically set to {cache_dir}/{file_name}

This fails in 2 cases:

• Same file name exists in different hf_repo
• Same file name exists in the same hf_repo, but in different subdirs

For example:

Same file name, same repo, different subdir:

hf_repo	hf_file
ggml-org/models	bert-bge-small/ggml-model-f16.gguf
ggml-org/models	jina-reranker-v1-tiny-en/ggml-model-f16.gguf

Same file name (Llama-3.2-1B-Instruct-Q4_K_M.gguf), different repo:

• https://huggingface.co/bartowski/Llama-3.2-1B-Instruct-GGUF
• https://huggingface.co/lmstudio-community/Llama-3.2-1B-Instruct-GGUF

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[Blondy4life2005]

Very interesting