ggml : AVX IQ quants (ggml-org#7845)

* initial iq4_xs

* fix ci

* iq4_nl

* iq1_m

* iq1_s

* iq2_xxs

* iq3_xxs

* iq2_s

* iq2_xs

* iq3_s before sllv

* iq3_s

* iq3_s small fix

* iq3_s sllv can be safely replaced with sse multiply

Author: netrunnereve