Add utility functions to AnonymizedFaker

[pvk-developer]

Problem Description

In order to work directly with an sdtype (eg: 'job' as sdtype), it would be usefull to have the following two utility functions in AnonymizedFaker:

• is_faker_function: A function that returns True or False whether or not the provided sdtype is considered a faker function.
• get_provider_name: A function that returns the provider_name for the given sdtype.

With the following functions we would be able to support wider range of sdtypes.

Expected behavior

from rdt.transformers.pii.utilis import get_provider_name, is_faker_function

is_faker_function('job')
True

get_provider_name('job')
job

get_provider_name('lexify'):
BaseProvider

Additional context

By adding this two features we will be able to remove faker dependency from https://github.com/sdv-dev/SDV