Optimize MinMaxScaler

current impl of MinMaxScaler has some small places to be optimized:

1, avoid call param getter in udf.

If I remember correctly, there was some tickets and prs about this, calling param getter in udf or map function, will significantly slow down the computation.

2, for a constant dim, the transformed value is also a constant value, which can be precomputed.

3, for a usual dim (i-th), the value is update by

values = (values - minArray) / range * scale + $(min)

here, we can precompute  scale / range, so that a division can be skipped.