Split and clean up GGUF quantization tests (#35502)

* clean up ggml test

Signed-off-by: Isotr0py <2037008807@qq.com>

* port remaining tests

Signed-off-by: Isotr0py <2037008807@qq.com>

* further cleanup

Signed-off-by: Isotr0py <2037008807@qq.com>

* format

Signed-off-by: Isotr0py <2037008807@qq.com>

* fix broken tests

Signed-off-by: Isotr0py <2037008807@qq.com>

* update comment

Signed-off-by: Isotr0py <2037008807@qq.com>

* fix

Signed-off-by: Isotr0py <2037008807@qq.com>

* reorganize tests

Signed-off-by: Isotr0py <2037008807@qq.com>

* k-quants use qwen2.5-0.5B

Signed-off-by: Isotr0py <2037008807@qq.com>

* move ggml tokenization test

Signed-off-by: Isotr0py <2037008807@qq.com>

* remove dead code

Signed-off-by: Isotr0py <2037008807@qq.com>

* add assert for serilization test

Signed-off-by: Isotr0py <2037008807@qq.com>

* use str for parameterize

Signed-off-by: Isotr0py <2037008807@qq.com>

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Signed-off-by: Isotr0py <2037008807@qq.com>

Author: Isotr0py