Refactor validators into separate types module

gso/api/v1/network.py

gso/cli/imports.py

gso/products/product_blocks/iptrunk.py

gso/products/product_blocks/lan_switch_interconnect.py

gso/products/product_blocks/site.py

gso/services/librenms_client.py

gso/services/subscriptions.py

gso/translations/en-GB.json

gso/types/__init__.py

gso/types/base_site.py

gso/types/coordinates.py

gso/types/country_code.py

gso/types/interfaces.py

gso/types/ip_address.py

gso/types/netbox_router.py

gso/types/site_name.py

gso/types/snmp.py

gso/types/tt_number.py

gso/types/unique_field.py

gso/utils/helpers.py