Vulkan MMQ Integer Dot Refactor and K-Quant support (#16536)
* vulkan: add mmq q2_k integer dot support
* Refactor mmq caching
* Reduce mmq register use
* Load 4 quant blocks into shared memory in one step
* Pack q2_k blocks into caches of 32
* Use 32-bit accumulators for integer dot matmul
* Add q4_k mmq
* Add q3_k mmq
* Add q5_k mmq
* Add q6_k mmq
* Add mxfp4 mmq, enable MMQ MUL_MAT_ID
* Fix mmv dm loads
