* vulkan: support copy from f32 to q4_0/q4_1/q5_0/q5_1/q8_0/iq4_nl Shaders are based on cpy.cu. * vulkan: support copy from q4_0/q4_1/q5_0/q5_1/q8_0/iq4_nl to f32 * ggml: copy q->f32 assumes some contiguity in the destination