[#661] blobovniczatree: Make Rebuild failover safe

Now move info stores in blobovnicza, so in case of failover
rebuild completes previous operation first.

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/local_object_storage/blobstor/blobovniczatree/delete.go

@@ -3,6 +3,7 @@ package blobovniczatree
 import (
 	"context"
 	"encoding/hex"
+	"errors"
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
@@ -18,6 +19,8 @@ import (
 	"go.uber.org/zap"
 )
 
+var errObjectIsDeleteProtected = errors.New("object is delete protected")
+
 // Delete deletes object from blobovnicza tree.
 //
 // If blobocvnicza ID is specified, only this blobovnicza is processed.
@@ -49,6 +52,10 @@ func (b *Blobovniczas) Delete(ctx context.Context, prm common.DeletePrm) (res co
 		return common.DeleteRes{}, errRebuildInProgress
 	}
 
+	if b.deleteProtectedObjects.Contains(prm.Address) {
+		return common.DeleteRes{}, errObjectIsDeleteProtected
+	}
+
 	var bPrm blobovnicza.DeletePrm
 	bPrm.SetAddress(prm.Address)