Implement vectorized hashing for dictionary types

[Dandandan]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
Currently only primitive types and string types are supported as dictionary keys.
For hash join and hash aggregate we need to hash values.

Describe the solution you'd like
Implement dictionary type in create_hashes function.

Describe alternatives you've considered
n/a

Additional context
Dictionary types are supported for group by now via create_key_for_col. There is an explicit check on using hash repartitioning for dictionary keys in the physical planner. This check can be removed when dictionaries are supported in create_hashes.