Add stop hook support for external providers

[mikesir87]

Description

When using providers, the only lifecycle hooks currently available are up and down. It would be nice to also support stop.

Use case:

1. Start a Compose stack using watch:

   docker compose up --watch

   The external provider is used to start the expected service.

2. Stop the stack using Ctrl+C. All containers stop, but the external service has no hook to stop as well, leaving it up and running.

[ndeloof]

make sense