llama : add Phi-4-mini support (supersede #12099) (#12108)
* Added Phi-4-mini-instruct support
* Update regex per ngxson
* Change the vocab base to Xenova/gpt-4o
* fix conversion update script
* no need to check longrope
* minor style fix
* fix python style
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Co-authored-by: Nicholas Sparks <nisparks@microsoft.com>
