addjust edgeport migration with new L3 core service migration wf

gso/products/__init__.py

gso/services/subscriptions.py

gso/tasks/__init__.py

gso/utils/workflow_steps.py

gso/workflows/edge_port/migrate_edge_port.py

gso/workflows/l2_circuit/migrate_layer2_circuit.py

gso/workflows/l2_circuit/modify_layer_2_circuit.py

gso/workflows/l3_core_service/migrate_l3_core_service.py

test/workflows/__init__.py

test/workflows/edge_port/test_migrate_edge_port.py

test/workflows/iptrunk/test_create_iptrunk.py

test/workflows/iptrunk/test_migrate_iptrunk.py

.../workflows/l3_core_service/test_create_l3_core_service.py

...workflows/l3_core_service/test_migrate_l3_core_service.py

test/workflows/router/test_create_router.py

test/workflows/switch/test_create_switch.py