Set the default transformer for GPS column relationship

[R-Palazzo]

Problem Description

As a user, when I set a gps column relationship, I'm expecting the columns to be transformed with the MetroAreaAnonymizer if I have access to it and AnonymizedFaker otherwise

Expected behavior

Update the following dict inside the data processor to set the MetroAreaAnonymizer as default transformer for the gps relationship:

SDV/sdv/data_processing/data_processor.py

Line 70 in 5ef78d3

_COLUMN_RELATIONSHIP_TO_TRANSFORMER = {

Also update the metadata validation similarly to what is done for the address relationship:

SDV/sdv/metadata/validation.py

Line 22 in 5ef78d3

def validate_address_sdtypes(columns_to_sdtypes):

Additional context

The logic is the same as the address relationship, so it can be use as example.