Feature/nat 410 add validator for tty number

gso/workflows/iptrunk/create_iptrunk.py

@@ -58,15 +58,12 @@ def initial_input_form_generator(product_name: str) -> FormGenerator:
         iptrunk_speed: PhyPortCapacity
         iptrunk_minimum_links: int
 
-
         @validator("tt_number", allow_reuse=True)
         def validate_tt_number(cls, tt_number) -> str:
             return validate_tt_number(tt_number)
 
-
     initial_user_input = yield CreateIptrunkForm
 
-
     router_enum_a = Choice("Select a router", zip(routers.keys(), routers.items(), strict=True))  # type: ignore[arg-type]
 
     class SelectRouterSideA(FormPage):