do not remove publications of slot defined in manifest (#2868)

* do not remove publications of slot defined in manifest
* improve condition to sync streams
* init publication tables map when adding manifest slots
* need to update c.Stream when there is no update

pkg/cluster/cluster.go

@@ -1160,6 +1160,7 @@ func (c *Cluster) Update(oldSpec, newSpec *acidv1.Postgresql) error {
 
 	// streams
 	if len(newSpec.Spec.Streams) > 0 || len(oldSpec.Spec.Streams) != len(newSpec.Spec.Streams) {
+		c.logger.Debug("syncing streams")
 		if err := c.syncStreams(); err != nil {
 			c.logger.Errorf("could not sync streams: %v", err)
 			updateFailed = true