Change auto_assign_transformers to handle id types

[amontanez24]

Problem Description

As a user, it would be nice for my primary keys to be generated correctly even if they're numeric.

Expected behavior

• Any column with an sdtype of 'id' should be assigned to a RegexGenerator. The default regex depends on the following cases:
  • If the regex is provided in the metadata, use

  RegexGenerator(regex_format=<from metadata>, enforce_uniqueness=is_primary_or_alternate_key)

  • If there is no regex but they dtype is an int than use

  RegexGenerator(regex_format="\d{30}", enforce_uniqueness=is_primary_or_alternate_key)

  • If there is no regex and the dtype is not an int use

  RegexGenerator(regex_format="[0-1a-z]{5}", enforce_uniqueness=is_primary_or_alternate_key)

• Notice that we should only enforce uniqueness if the column is a primary or alternate key.