llama: store mrope data in KV cell (#16825)
* llama: store mrope data in KV cell
* correct x,y ordering
* address review comments
* add consistency checks
* Update src/llama-kv-cache.cpp
Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>
* add TODO
* fix asan error
* kv-cells : improve ext handling
* cont : fix headers
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Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>
