[#1298] writecache: Add shrink flag for Seal command

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

pkg/local_object_storage/shard/writecache.go

@@ -61,6 +61,7 @@ func (s *Shard) FlushWriteCache(ctx context.Context, p FlushWriteCachePrm) error
 type SealWriteCachePrm struct {
 	IgnoreErrors bool
 	RestoreMode  bool
+	Shrink       bool
 }
 
 // SealWriteCache flushes all data from the write-cache and moves it to degraded read only mode.
@@ -87,5 +88,5 @@ func (s *Shard) SealWriteCache(ctx context.Context, p SealWriteCachePrm) error {
 		return ErrDegradedMode
 	}
 
-	return s.writeCache.Seal(ctx, writecache.SealPrm{IgnoreErrors: p.IgnoreErrors, RestoreMode: p.RestoreMode})
+	return s.writeCache.Seal(ctx, writecache.SealPrm{IgnoreErrors: p.IgnoreErrors, RestoreMode: p.RestoreMode, Shrink: p.Shrink})
 }