make type ignore statements more specific

gso/products/product_blocks/iptrunk.py

gso/services/provisioning_proxy.py

gso/workflows/iptrunk/create_iptrunk.py

gso/workflows/iptrunk/migrate_iptrunk.py

gso/workflows/iptrunk/modify_trunk_interface.py

gso/workflows/iptrunk/terminate_iptrunk.py

gso/workflows/router/create_router.py

gso/workflows/router/terminate_router.py

gso/workflows/site/create_site.py

gso/workflows/tasks/import_iptrunk.py

gso/workflows/utils.py