[#607] *: Use zap.Stringer() where possible

Semantic patch:
```
@@
var f expression
var t expression
var a expression
@@
 f(
    ...,
-    zap.String(t, a.String()),
+    zap.Stringer(t, a),
    ...,
)
```

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

cmd/frostfs-node/grpc.go

@@ -104,14 +104,14 @@ func serveGRPC(c *cfg) {
 		go func() {
 			defer func() {
 				c.log.Info(logs.FrostFSNodeStopListeningGRPCEndpoint,
-					zap.String("endpoint", lis.Addr().String()),
+					zap.Stringer("endpoint", lis.Addr()),
 				)
 
 				c.wg.Done()
 			}()
 
 			c.log.Info(logs.FrostFSNodeStartListeningGRPCEndpoint,
-				zap.String("endpoint", lis.Addr().String()),
+				zap.Stringer("endpoint", lis.Addr()),
 			)
 
 			if err := srv.Serve(lis); err != nil {

pkg/innerring/processors/frostfs/process_assets.go

@@ -45,7 +45,7 @@ func (np *Processor) processDeposit(deposit frostfsEvent.Deposit) bool {
 	val, ok := np.mintEmitCache.Get(receiver.String())
 	if ok && val+np.mintEmitThreshold >= curEpoch {
 		np.log.Warn(logs.FrostFSDoubleMintEmissionDeclined,
-			zap.String("receiver", receiver.String()),
+			zap.Stringer("receiver", receiver),
 			zap.Uint64("last_emission", val),
 			zap.Uint64("current_epoch", curEpoch))
 

pkg/local_object_storage/engine/remove_copies.go

@@ -55,7 +55,7 @@ func (e *StorageEngine) RemoveDuplicates(ctx context.Context, prm RemoveDuplicat
 	// This is not currently the case, because `FreeSpace` metric used by weight sorting is always 0.
 	// However we could change weights in future and easily forget this function.
 	for _, sh := range e.shards {
-		e.log.Debug(logs.EngineStartedDuplicatesRemovalRoutine, zap.String("shard_id", sh.ID().String()))
+		e.log.Debug(logs.EngineStartedDuplicatesRemovalRoutine, zap.Stringer("shard_id", sh.ID()))
 		ch := make(chan oid.Address)
 
 		errG, ctx := errgroup.WithContext(ctx)

pkg/local_object_storage/shard/id.go

@@ -49,7 +49,7 @@ func (s *Shard) UpdateID() (err error) {
 		}
 	}
 
-	s.log = &logger.Logger{Logger: s.log.With(zap.String("shard_id", s.info.ID.String()))}
+	s.log = &logger.Logger{Logger: s.log.With(zap.Stringer("shard_id", s.info.ID))}
 	s.metaBase.SetLogger(s.log)
 	s.blobStor.SetLogger(s.log)
 	if s.hasWriteCache() {

pkg/services/tree/signature.go

@@ -89,7 +89,7 @@ func (s *Service) verifyClient(req message, cid cidSDK.ID, rawBearer []byte, op
 		if !basicACL.AllowedBearerRules(op) {
 			s.log.Debug(logs.TreeBearerPresentedButNotAllowedByACL,
 				zap.String("cid", cid.EncodeToString()),
-				zap.String("op", op.String()),
+				zap.Stringer("op", op),
 			)
 		} else {
 			useBearer = true