opencl: add basic support for q5_k (ggml-org#21593)

* opencl: add general q5_k mv

* opencl: add flattened Q5_K mv and general Q5_K mm

* opencl: fix Q5_K unit tests

Author: shaofeiqi

ggml/src/ggml-opencl/CMakeLists.txt

@@ -90,6 +90,8 @@ set(GGML_OPENCL_KERNELS
     mul_mv_q4_1_f32_flat
     mul_mv_q4_k_f32
     mul_mv_q4_k_f32_flat
+    mul_mv_q5_k_f32
+    mul_mv_q5_k_f32_flat
     mul_mv_q6_k_f32
     mul_mv_q6_k_f32_flat
     mul_mv_q8_0_f32
@@ -109,6 +111,7 @@ set(GGML_OPENCL_KERNELS
     mul_mm_q4_1_f32_l4_lm
     mul_mm_q8_0_f32_l4_lm
     mul_mm_q4_k_f32_l4_lm
+    mul_mm_q5_k_f32_l4_lm
     mul_mm_q6_k_f32_l4_lm
     mul_mm_q8_0_f32_8x4
     gemv_noshuffle_q4_1_f32