Refactor parameters in F32 VRND microkernels

- Move mask_table into AVX microkernel parameters to unblock amalgamation
- Move constant literals into microkernel parameters

PiperOrigin-RevId: 419529540
diff --git a/test/f32-vrndne.yaml b/test/f32-vrndne.yaml
index e513e4b..bcc5076 100644
--- a/test/f32-vrndne.yaml
+++ b/test/f32-vrndne.yaml
@@ -7,15 +7,21 @@
 - name: xnn_f32_vrndne_ukernel__neonv8_x4
 - name: xnn_f32_vrndne_ukernel__neonv8_x8
 - name: xnn_f32_vrndne_ukernel__sse2_x4
+  init: xnn_init_f32_rnd_sse2_params
 - name: xnn_f32_vrndne_ukernel__sse2_x8
+  init: xnn_init_f32_rnd_sse2_params
 - name: xnn_f32_vrndne_ukernel__sse41_x4
 - name: xnn_f32_vrndne_ukernel__sse41_x8
 - name: xnn_f32_vrndne_ukernel__avx_x8
+  init: xnn_init_f32_rnd_avx_params
 - name: xnn_f32_vrndne_ukernel__avx_x16
+  init: xnn_init_f32_rnd_avx_params
 - name: xnn_f32_vrndne_ukernel__avx512f_x16
 - name: xnn_f32_vrndne_ukernel__avx512f_x32
 - name: xnn_f32_vrndne_ukernel__wasmsimd_addsub_x4
+  init: xnn_init_f32_rnd_wasmsimd_params
 - name: xnn_f32_vrndne_ukernel__wasmsimd_addsub_x8
+  init: xnn_init_f32_rnd_wasmsimd_params
 - name: xnn_f32_vrndne_ukernel__wasmsimd_native_x4
 - name: xnn_f32_vrndne_ukernel__wasmsimd_native_x8
 - name: xnn_f32_vrndne_ukernel__scalar_libm_x1