Add QA_EE_ACTIVATION_CODE_NO_ADD_ON Credential
What does this MR do and why?
This MR:
- Documents the
QA_EE_ACTIVATION_CODE_NO_ADD_ON
credential, which had recently been added in https://gitlab.com/gitlab-org/quality/quality-engineering/team-tasks/-/issues/2502 - Adds a brief description for each license type
- Updates the link to reference SET counterparts for the Fulfillment stage, rather than groupprovision specifically, now that we no longer have SET counterparts for specific groups due to the Test Platform team restructure