[#857] golangci: Add perfsprint linter

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

.golangci.yml

@@ -79,5 +79,6 @@ linters:
     - contextcheck
     - importas
     - truecloudlab-linters
+    - perfsprint
   disable-all: true
   fast: false

pkg/metrics/writecache.go

@@ -1,7 +1,7 @@
 package metrics
 
 import (
-	"fmt"
+	"strconv"
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-observability/metrics"
@@ -52,7 +52,7 @@ func (m *writeCacheMetrics) AddMethodDuration(shardID string, method string, suc
 	m.methodDuration.With(
 		prometheus.Labels{
 			shardIDLabel: shardID,
-			successLabel: fmt.Sprintf("%v", success),
+			successLabel: strconv.FormatBool(success),
 			storageLabel: storageType,
 			methodLabel:  method,
 		},