[#789] cmd/node: Add refill_metabase config to shard section

Implement `RefillMetabase` method to `shardconfig.Config` type which reads
`refill_metabase` config value. Pass the result to `WithRefillMetabase`
option.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

cmd/neofs-node/config.go

@@ -384,6 +384,7 @@ func initShardOptions(c *cfg) {
 
 		opts = append(opts, []shard.Option{
 			shard.WithLogger(c.log),
+			shard.WithRefillMetabase(sc.RefillMetabase()),
 			shard.WithBlobStorOptions(
 				blobstor.WithRootPath(blobStorCfg.Path()),
 				blobstor.WithCompressObjects(blobStorCfg.Compress(), c.log),

cmd/neofs-node/config/engine/shard/config.go

@@ -58,3 +58,13 @@ func (x *Config) GC() *gcconfig.Config {
 			Sub("gc"),
 	)
 }
+
+// RefillMetabase returns value of "refill_metabase" config parameter.
+//
+// Returns false if value is not a valid bool.
+func (x *Config) RefillMetabase() bool {
+	return config.BoolSafe(
+		(*config.Config)(x),
+		"refill_metabase",
+	)
+}