`promote_p_to_pe`: update in `add_all_p_to_pe`

extra_vars: need to exclude this promoted router, since it is still `P`
role.

gso/workflows/router/promote_p_to_pe.py

@@ -440,7 +440,7 @@ def update_subscription_model(subscription: Router) -> State:
     return {"subscription": subscription}
 
 
-@step("[DRY RUN] Add all P to PE")
+@step("[DRY RUN] Add all P to this new PE")
 def add_all_p_to_pe_dry(subscription: dict[str, Any], callback_route: str, tt_number: str, process_id: UUIDstr) -> None:
     """Perform a dry run of adding all P routers to the PE router."""
     extra_vars = {
@@ -448,7 +448,9 @@ def add_all_p_to_pe_dry(subscription: dict[str, Any], callback_route: str, tt_nu
         "subscription": subscription,
         "commit_comment": f"GSO_PROCESS_ID: {process_id} - TT_NUMBER: {tt_number} - Add all P-routers to this new PE",
         "verb": "add_all_p_to_pe",
-        "p_router_list": generate_inventory_for_active_routers(RouterRole.P)["all"]["hosts"],
+        "p_router_list": generate_inventory_for_active_routers(
+            RouterRole.P, exclude_routers=[subscription["router"]["router_fqdn"]]
+        )["all"]["hosts"],
     }
 
     lso_client.execute_playbook(
@@ -459,7 +461,7 @@ def add_all_p_to_pe_dry(subscription: dict[str, Any], callback_route: str, tt_nu
     )
 
 
-@step("[FOR REAL] Add all P to PE")
+@step("[FOR REAL] Add all P to this new PE")
 def add_all_p_to_pe_real(
     subscription: dict[str, Any], callback_route: str, tt_number: str, process_id: UUIDstr
 ) -> None:
@@ -469,7 +471,9 @@ def add_all_p_to_pe_real(
         "subscription": subscription,
         "commit_comment": f"GSO_PROCESS_ID: {process_id} - TT_NUMBER: {tt_number} - Add all P-routers to this new PE",
         "verb": "add_all_p_to_pe",
-        "p_router_list": generate_inventory_for_active_routers(RouterRole.P)["all"]["hosts"],
+        "p_router_list": generate_inventory_for_active_routers(
+            RouterRole.P, exclude_routers=[subscription["router"]["router_fqdn"]]
+        )["all"]["hosts"],
     }
 
     lso_client.execute_playbook(