use logger.LogOnce to reduce printing disconnection logs (#15408)

fixes #15334

- re-use net/url parsed value for http.Request{}
- remove gosimple, structcheck and unusued due to https://github.com/golangci/golangci-lint/issues/2649
- unwrapErrs upto leafErr to ensure that we store exactly the correct errors

internal/logger/target/kafka/kafka.go

@@ -129,7 +129,7 @@ type Config struct {
 	} `json:"sasl"`
 
 	// Custom logger
-	LogOnce func(ctx context.Context, err error, id interface{}, errKind ...interface{}) `json:"-"`
+	LogOnce func(ctx context.Context, err error, id string, errKind ...interface{}) `json:"-"`
 }
 
 // Check if atleast one broker in cluster is active