[FEA] More efficient bound check for GpuCast

[ttnghia]

In GpuCast, when ansi mode is enabled, the input column is checked if all its values are within the boundary values of the target type. Such check is performed by calling the assertValuesInRange function.

However, that function is inefficient: It calls lessThan operator, then any, then greaterThan, and then any again. All these operators run in O(N) time. We can achieve the same result but in half of the computation by using a new approach:

• Call min and max on the input column, which both run in O(N) time, then
• Compare the min/max values with the boundary values of the target type. This is just O(1) time.