Expand compliance suite to other GA4GH services

The TES compliance suite can be made abstract to be expanded to be compatible with other GA4GH services.
The suite will function as `ga4gh-test-runner` containing the logic to validate each service.
A separate repository can be created to store the YAML test files, eg `tes-compliance-tests`. These test files can be used by the `ga4gh-test-runner` while mentioning which service we want to test via the CLI.

The `ga4gh-test-runner` will contain the Test file template and schema, which can be referred by GA4GH services to add new test file or integrate a new service.