NEON implementations of QS8 2x8c16 GEMM and IGEMM assembly microkernels

PiperOrigin-RevId: 382565189
diff --git a/test/qs8-igemm-minmax-fp32.yaml b/test/qs8-igemm-minmax-fp32.yaml
index c30c31b..b2ecf87 100644
--- a/test/qs8-igemm-minmax-fp32.yaml
+++ b/test/qs8-igemm-minmax-fp32.yaml
@@ -3,6 +3,9 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+- name: xnn_qs8_igemm_minmax_fp32_ukernel_2x8c16__aarch64_neon_mlal_padal
+  init: xnn_init_qs8_conv_minmax_fp32_neonv8_params
+  k-block: 16
 - name: xnn_qs8_igemm_minmax_fp32_ukernel_4x16__aarch64_neon_mlal_lane_prfm_cortex_a53
   init: xnn_init_qs8_conv_minmax_fp32_neonv8_params
   k-block: 8