Run proper testing

Author: jormundur00

metadata/io.netty/netty-transport/4.1.115.Final/index.json

@@ -0,0 +1,3 @@
+[
+  "reflect-config.json"
+]

metadata/io.netty/netty-transport/4.1.80.Final/index.json

@@ -0,0 +1,3 @@
+[
+  "reflect-config.json"
+]

tests/tck-build-logic/src/main/java/org/graalvm/internal/tck/MetadataFilesCheckerTask.java

@@ -34,6 +34,7 @@ public abstract class MetadataFilesCheckerTask extends DefaultTask {
     protected abstract RegularFileProperty getIndexFile();
 
     private final Set<String> EXPECTED_FILES = new HashSet<>(List.of(
+            "index.json",
             "reflect-config.json",
             "resource-config.json",
             "serialization-config.json",