Operator logging for database init SQL failures (#3033)

If there is an error in the init SQL that runs as part of reconcileDatabaseInitSQL, then there is no way for the user to know what the error is.  Adding this additional log statement will make it easier for users to know when init sql operations have succeeded and/or failed.  It also brings this part of the code up to par with other similar operations in the codebase.

Issue: #3029

Co-authored-by: Jeff Martin <jeff.martin@previ.com>

Author: jmartin127

internal/controller/postgrescluster/postgres.go

@@ -738,7 +738,8 @@ func (r *Reconciler) reconcileDatabaseInitSQL(ctx context.Context,
 	// A writable pod executor has been found and we have the sql provided by
 	// the user. Setup a write function to execute the sql using the podExecutor
 	write := func(ctx context.Context, exec postgres.Executor) error {
-		_, _, err := exec.Exec(ctx, strings.NewReader(data), map[string]string{})
+		stdout, stderr, err := exec.Exec(ctx, strings.NewReader(data), map[string]string{})
+		log.V(1).Info("applied init SQL", "stdout", stdout, "stderr", stderr)
 		return err
 	}