Is your feature request related to a problem?

As a part of the GraalVM Reachability Metadata repository 1.0 release, we should remove the index file located in the tests/src directory.

Describe the solution you'd like

We need to change the logic of the tck so we can infer the information given by the said index file, either through paths, or through the remaining metadata index.json.

Describe alternatives you've considered

No response

Additional context

No response