Run modernize (#21546)

`go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -fix -test ./...` executed.

`go generate ./...` ran afterwards to keep generated.

cmd/config-current.go

@@ -21,6 +21,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"maps"
 	"strings"
 	"sync"
 
@@ -78,12 +79,8 @@ func initHelp() {
 		config.BatchSubSys:          batch.DefaultKVS,
 		config.BrowserSubSys:        browser.DefaultKVS,
 	}
-	for k, v := range notify.DefaultNotificationKVS {
-		kvs[k] = v
-	}
-	for k, v := range lambda.DefaultLambdaKVS {
-		kvs[k] = v
-	}
+	maps.Copy(kvs, notify.DefaultNotificationKVS)
+	maps.Copy(kvs, lambda.DefaultLambdaKVS)
 	if globalIsErasure {
 		kvs[config.StorageClassSubSys] = storageclass.DefaultKVS
 		kvs[config.HealSubSys] = heal.DefaultKVS