llava : support for Yi-VL and fix for mobileVLM (#5093)

* Support for Yi-VL, templating fix for mobileVLM

* ws

* Update examples/llava/clip.cpp

Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>

* Update llava-cli.cpp

* Update clip.cpp

bugfix for new conversions

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Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>