chore: style fixes from go fix (#10846)

Just `go fix ./...`

Signed-off-by: Jakob Borg <jakob@kastelo.net>

internal/slogutil/leveler.go

@@ -41,8 +41,8 @@ func SetDefaultLevel(level slog.Level) {
 }
 
 func SetLevelOverrides(sttrace string) {
-	pkgs := strings.Split(sttrace, ",")
-	for _, pkg := range pkgs {
+	pkgs := strings.SplitSeq(sttrace, ",")
+	for pkg := range pkgs {
 		pkg = strings.TrimSpace(pkg)
 		if pkg == "" {
 			continue

internal/slogutil/slogadapter.go

@@ -45,11 +45,11 @@ type adapter struct {
 	l *slog.Logger
 }
 
-func (a adapter) Debugln(vals ...interface{}) {
+func (a adapter) Debugln(vals ...any) {
 	a.log(strings.TrimSpace(fmt.Sprintln(vals...)), slog.LevelDebug)
 }
 
-func (a adapter) Debugf(format string, vals ...interface{}) {
+func (a adapter) Debugf(format string, vals ...any) {
 	a.log(fmt.Sprintf(format, vals...), slog.LevelDebug)
 }