[#959] node: Set mode to shard's components when open it

Avoid opening database for `metabase` and `cache` in `Degraded` mode.

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

pkg/local_object_storage/writecache/cachebbolt.go

@@ -95,8 +95,14 @@ func (c *cache) DumpInfo() Info {
 }
 
 // Open opens and initializes database. Reads object counters from the ObjectCounters instance.
-func (c *cache) Open(_ context.Context, readOnly bool) error {
-	err := c.openStore(readOnly)
+func (c *cache) Open(_ context.Context, mode mode.Mode) error {
+	c.modeMtx.Lock()
+	defer c.modeMtx.Unlock()
+	c.mode = mode
+	if mode.NoMetabase() {
+		return nil
+	}
+	err := c.openStore(mode.ReadOnly())
 	if err != nil {
 		return metaerr.Wrap(err)
 	}