llama : add jina v2 base code (#7596)

* feat: add changes to handle jina v2 base code

* fix: do not complicate things

* fix: fix the usage of the code model

* fix: fix comments

* fix: fix linting issues

* fix: remove ollama patches

* style : minor

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