Add proxy destroy

Make the current destroy method on the core for proxies to remove the
server side resource.
Make a new destroy method on the registry to destroy globals.
Remove the destroy method on the client-node
media-session: monitor the dsp and device node states to manage the
session state

src/tools/pipewire-cli.c

@@ -992,7 +992,7 @@ static bool do_destroy(struct data *data, const char *cmd, char *args, char **er
 		asprintf(error, "%s: unknown global %d", cmd, id);
 		return false;
 	}
-	pw_core_proxy_destroy(rd->core_proxy, id);
+	pw_registry_proxy_destroy(rd->registry_proxy, id);
 
 	return true;
 }