fix all mypy complains

gso/products/product_blocks/lan_switch_interconnect.py

gso/products/product_blocks/pop_vlan.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/terminate_router.py

gso/workflows/router/update_ibgp_mesh.py

gso/workflows/site/terminate_site.py