Start table of baseline entitlements
Background
https://gitlab.com/gitlab-com/gl-security/compliance/compliance/issues/328
Goal
This MR starts the process of defining some (but not all) of the systems that all GitLabbers should have access to. When we identify additional systems that share this need, we can add to this table and, if appropriate, to the GitLabber onboarding template.
Closes: https://gitlab.com/gitlab-com/gl-security/compliance/compliance/issues/328