lint: apply x/tools/modernize fixes

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

util/otelutil/span.go

@@ -149,7 +149,7 @@ type keyValue struct {
 // value is a custom type used to unmarshal otel Value correctly.
 type value struct {
 	Type  string
-	Value interface{}
+	Value any
 }
 
 // UnmarshalJSON implements json.Unmarshaler for Span which allows correctly
@@ -318,7 +318,7 @@ func (kv *keyValue) asAttributeKeyValue() (attribute.KeyValue, error) {
 		switch sli := kv.Value.Value.(type) {
 		case []string:
 			strSli = sli
-		case []interface{}:
+		case []any:
 			for i := range sli {
 				var v string
 				// best case we have a string, otherwise, cast it using