Porting the improved K-Quant CUDA kernels to OpenCL (#1966)

* Added broken new q4k quant

* xx + ib0

* Fix q2_k fast kernel

* Use preprocessor for QK_K

* Add q6_k fast matmul kernel

* ported q3k speedup successfully

* ported q2k and q5k speedups

* remove old dot kernels and template

* fixed global const struct types

* fixing address spaces

* fixed string too long CI issue

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Co-authored-by: 0cc4m <[email protected]>

Author: LostRuins