Implement our own custom hasher

[Synicix]

Replacement for arrow-digest, since its hash depends on the order of fields elements, and missing some additional data type support that we may need in the future.

Other fixes:

• For certain types like decimal, timeunit, arrow-digest doesn't hash the meta info about the bytes leading to possible collision between two different data but same byte representation. i.e 1.20 (scale: 2, precision: 3), vs 12.0 (scale:1, precision 3) both have the byte representation of the number 120 in arrow, since scale and precision is stored in metadata.

Fixes PLT-451