Update on "[ET-VK] Applying bias after sum calculation in conv2d pw shader to improve performance."

This diff improves the performance of the conv2d pw shader by changing the order of operations to apply bias after the sum calculation.

Differential Revision: [D75450662](https://our.internmc.facebook.com/intern/diff/D75450662/)

[ghstack-poisoned]

Author: trivedivivek

backends/vulkan/runtime/graph/ops/glsl/conv2d_pw_s1p0.glsl

@@ -14,8 +14,8 @@
 
 #define VEC4_T ${texel_type(DTYPE)}
 
-#define TILE_SIZE_X ${TILE_SIZE_X}us
-#define TILE_SIZE_Y ${TILE_SIZE_Y}us
+#define TILE_SIZE_X uint16_t(${TILE_SIZE_X})
+#define TILE_SIZE_Y uint16_t(${TILE_SIZE_Y})
 
 #define op(X, A, B) ${OPERATOR}
 
@@ -67,8 +67,8 @@ void main() {
   // | pos[2] | pos[3] |
   // +--------+--------+
   uint16_t pos[TILE_SIZE_X * TILE_SIZE_Y * 2];
-  for (uint16_t y = 0us, i = 0us; y < TILE_SIZE_Y; ++y) {
-    for (uint16_t x = 0us; x < TILE_SIZE_X; ++x) {
+  for (uint16_t y = uint16_t(0), i = uint16_t(0); y < TILE_SIZE_Y; ++y) {
+    for (uint16_t x = uint16_t(0); x < TILE_SIZE_X; ++x) {
       pos[i * 2] = out_pos_xy[0] * TILE_SIZE_X + x;
       pos[i * 2 + 1] = out_pos_xy[1] * TILE_SIZE_Y + y;
       i++;