Remove unneeded noise from the cleanup watcher in case the plugin state directory hasn't been created yet.

PiperOrigin-RevId: 869935168

Author: drewhli

internal/plugin/manager/cleanup.go

@@ -39,6 +39,10 @@ func (m *PluginManager) retryFailedRemovals(ctx context.Context) (bool, error) {
 	pluginInstallLoc := filepath.Join(baseState(), pluginInstallDir)
 	pluginDirs, err := os.ReadDir(pluginInstallLoc)
 	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			galog.Debugf("Plugin install directory %q does not exist, nothing to clean up", pluginInstallLoc)
+			return true, nil
+		}
 		return true, fmt.Errorf("failed to read plugin install directory: %w", err)
 	}