Add support for GGUF Phi-3 (#31844)

* Update docs for GGUF supported models

* Add tensor mappings and define class GGUFPhi3Converter

* Fix tokenizer

* Working version

* Attempt to fix some CI failures

* Run ruff format

* Add vocab, merges, decoder methods like LlamaConverter

* Resolve conflicts since Qwen2Moe was added to gguf

- I missed one place when resolving conflict
- I also made a mistake with tests_ggml.py and now has been fixed to reflect
its master version.

docs/source/en/gguf.md

@@ -79,6 +79,7 @@ For now the supported model architectures are the architectures that have been v
 - Mistral
 - Qwen2
 - Qwen2Moe
+- Phi3
 
 ## Example usage