[Mosaic:TPU] Fix bug after cl/707025084

`tile_masks` was updated to use implicit, but we skipped the reshape for `tiles`

Seems like there was even a bug before cl/707025084: `tile_masks` was never reshaped, so if the shape was 1D and a store mask was specified, there would be a mismatch in dimensions.

PiperOrigin-RevId: 707368670

Author: tlongeri

jaxlib/mosaic/dialect/tpu/transforms/apply_vector_layout.cc

@@ -4397,7 +4397,7 @@ LogicalResult vector_store_impl(RewriteContext &ctx, Op store_op,
   FAILUREOR_ASSIGN_OR_RETURN(
       xla::Array<Value> tiles,
       disassemble(builder, to_store_layout, store_op.getValueToStore(),
-                  ctx.target_shape));
+                  ctx.target_shape, /*use_implicit_shape=*/true));
   std::optional<xla::Array<Value>> tile_masks;
   if (store_mask) {
     FAILUREOR_ASSIGN_OR_RETURN(