Add Nemotron/Minitron GGUF Conversion & Inference Support (#8922)

* Add nemotron GGUF conversion & inference support

* Fix formatting issues

* Remove unnecessary write_tensors()

* Update convert_hf_to_gguf.py

Co-authored-by: compilade <git@compilade.net>

* Update src/llama.cpp

Co-authored-by: compilade <git@compilade.net>

* Address comments by @compilade

* Replace ggml_mul_mat()->llm_build_lora_mm()

* Remove mutable variable

* Use  for bias tensors

* Cover corner case for role_scaling not in config.json

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Co-authored-by: compilade <git@compilade.net>