[DOC] Add types of tests to documentation for Certification v1

[agentpoyo]

Need to add types to https://github.com/cncf/cnf-certification/blob/main/docs/CNFCertification-1.0-beta.md#cnf-certification-list-of-tests---v10-beta

Sample text to add:

[lixuna]

This effort has been completed in #22

New issue will be created for future enhancements