* vulkan: Handle updated FA dim2/3 definition Pack mask boolean and n_head_log2 into a single dword to keep the push constant block under the 128B limit. * handle null mask for gqa * allow gqa with dim3>1
* vulkan: Handle updated FA dim2/3 definition Pack mask boolean and n_head_log2 into a single dword to keep the push constant block under the 128B limit. * handle null mask for gqa * allow gqa with dim3>1