Allow indicating whether User is GitLab Team member for Backend Snowplow events

Problem

With Update StandardContext to allow for gitlab team... (#411275 - closed) we enable the sending of the information whether a user is a Gitlab team member via Snowplow. However, to add this information to a specific event developers would need to do the implementation separately for every event.

Desired outcome

We send the information, whether a user is a Gitlab team member automatically when possible and if it's not prohibitive from a performance point of view. Alternatively, we can try to make it very easy to send this information, e.g. by adapting our APIs

Open questions

• Are there cases where we can send this information automatically (e.g. in controllers) without taking a performance hit?