kill: Wait for container to exit after sigkill (#1589)

Today when we send a signal we don't wait for the container to exit, as
we don't know what signals the program will actually do anything with.
However, sigkill does not fit this mold, and we should wait for the
container to exit (or be removed for --rm containers).

Sources/ContainerCommands/Container/ContainerKill.swift

@@ -61,12 +61,10 @@ extension Application {
                 containers = containerIds
             }
 
-            let signalNumber = try Signal(signal).rawValue
-
             var errors: [any Error] = []
             for container in containers {
                 do {
-                    try await client.kill(id: container, signal: signalNumber)
+                    try await client.kill(id: container, signal: signal)
                     print(container)
                 } catch {
                     errors.append(error)