Allow macOS 15 to list and delete networks (apple#1464)

- A recent change moved the list and delete
  network XPC calls within an availability check,
  making them only available on macOS 26.
  However, there are some code flows that rely
  on being able to call `list` on the NetworksService,
  including anything that uses `networkClient.builtin`.
- `container` does not officially support macOS 15
  and as a result we do not have GitHub action runners
  for validation on macOS 15. That said, we try to avoid
  breaking compatibility on macOS 15 as much as
  possible.

Signed-off-by: Kathryn Baldauf <k_baldauf@apple.com>

Author: katiewasnothere

Sources/APIServer/APIServer+Start.swift

@@ -324,12 +324,12 @@ extension APIServer {
 
             let harness = NetworksHarness(service: service, log: log)
 
-            // network creation/deletion/list is not supported pre-macOS 26 (refer to AllocationOnlyVmnetNetwork)
+            // network creation is not supported pre-macOS 26 (refer to AllocationOnlyVmnetNetwork)
             if #available(macOS 26, *) {
                 routes[XPCRoute.networkCreate] = harness.create
-                routes[XPCRoute.networkDelete] = harness.delete
-                routes[XPCRoute.networkList] = harness.list
             }
+            routes[XPCRoute.networkList] = harness.list
+            routes[XPCRoute.networkDelete] = harness.delete
 
             return service
         }