[frontend] add new Operator fusion

[Old-cpu]

Operator fusion of residual networks has been added to the front end.

Before fusion：

    %cst_26 = arith.constant dense<0.000000e+00> : tensor<1x1536xf32>
    %129 = linalg.matmul {cast = #linalg.type_fn<cast_signed>} ins(%128, %arg14 : tensor<1x1536xf32>, tensor<1536x1536xf32>) outs(%cst_26 : tensor<1x1536xf32>) -> tensor<1x1536xf32>
    %130 = tosa.reshape %129 {new_shape = array<i64: 1, 1, 1536>} : (tensor<1x1536xf32>) -> tensor<1x1x1536xf32>
    %131 = tosa.add %2, %130 : (tensor<1x1x1536xf32>, tensor<1x1x1536xf32>) -> tensor<1x1x1536xf32>

After fusion

    %129 = tosa.reshape %2 {new_shape = array<i64: 1, 1536>} : (tensor<1x1x1536xf32>) -> tensor<1x1536xf32>
    %130 = linalg.matmul {cast = #linalg.type_fn<cast_signed>} ins(%128, %arg14 : tensor<1x1536xf32>, tensor<1536x1536xf32>) outs(%129 : tensor<1x1536xf32>) -> tensor<1x1536xf32>
    %131 = tosa.reshape %130 {new_shape = array<i64: 1, 1, 1536>} : (tensor<1x1536xf32>) -> tensor<1x1x1536xf32>