[#1869] shard: Embed `gcCfg` as raw struct

Signed-off-by: Evgenii Stratonikov <evgeniy@morphbits.ru>

pkg/local_object_storage/shard/control.go

@@ -135,7 +135,7 @@ func (s *Shard) Init() error {
 	s.updateObjectCounter()
 
 	s.gc = &gc{
-		gcCfg:       s.gcCfg,
+		gcCfg:       &s.gcCfg,
 		remover:     s.removeGarbage,
 		stopChannel: make(chan struct{}),
 		eventChan:   make(chan Event),

pkg/local_object_storage/shard/gc.go

@@ -82,8 +82,8 @@ type gcCfg struct {
 	workerPoolInit func(int) util.WorkerPool
 }
 
-func defaultGCCfg() *gcCfg {
-	return &gcCfg{
+func defaultGCCfg() gcCfg {
+	return gcCfg{
 		removerInterval: 10 * time.Second,
 		log:             &logger.Logger{Logger: zap.L()},
 		workerPoolInit: func(int) util.WorkerPool {

pkg/local_object_storage/shard/shard.go

@@ -85,7 +85,7 @@ type cfg struct {
 
 	log *logger.Logger
 
-	gcCfg *gcCfg
+	gcCfg gcCfg
 
 	expiredTombstonesCallback ExpiredTombstonesCallback