podman: remember hooks-dir on restarts

When podman restarts config values within the Engine are lost.
Add --hook-dirs arguments as appropriate to the cleanup command
so that hooks are preserved on restarts due to the on-restart setting

Tests: add a check that prestart/poststop hooks ran every time after 2
restarts.
`wait_for_restart_count` was re-used to wait for restarts and moved to
helpers file.

Signed-off-by: Dominique Martinet <dominique.martinet@atmark-techno.com>
Fixes: #17935

pkg/specgenutil/util.go

@@ -285,6 +285,9 @@ func CreateExitCommandArgs(storageConfig storageTypes.StoreOptions, config *conf
 		"--db-backend", config.Engine.DBBackend,
 		fmt.Sprintf("--transient-store=%t", storageConfig.TransientStore),
 	}
+	for _, dir := range config.Engine.HooksDir.Get() {
+		command = append(command, []string{"--hooks-dir", dir}...)
+	}
 	if storageConfig.ImageStore != "" {
 		command = append(command, []string{"--imagestore", storageConfig.ImageStore}...)
 	}