Improve llava support & add llava_qwen2 (#1324)
* Align llava processor with python library
* Add support for llava_qwen2
* Update llava unit tests
* Fix test
* Update florence2 processor & tests
* Update florence2 unit tests
* Revert "Update florence2 unit tests"
This reverts commit 47ecc3470114edd6eb864bd310b22a973a3e7b18.
* Skip flaky tests
