Add falcon gguf (#33437)
* feat(gguf): add falcon q2 k
* fix(gguf): remove useless renaming
* feat(gguf): seperate falcon 7b and 40b
* feat(gguf): apply fixup
* fix(test): error rebase
* feat(gguf): add fp16 weight comparison for falcon
* feat(gguf): test weight of all layers
* test(gguf): add falcon 40b under skip decorator
* feat(gguf): quick example for extracting model size
