Full context in [parent epic](https://gitlab.com/groups/gitlab-org/-/epics/7974). This epic contains issues to implement the screen-based approach to specify custom HTTP headers for streaming audit events. ### Designs [Figma designs](https://www.figma.com/file/085JyIbTONMD9B5tFhWIik/%23358163-Custom-HTTP-headers-with-streaming-audit-events?node-id=54%3A23549) | List | List (before updating is available) | Max header limit reached | Add stream | Edit stream | | ---- | ----------------------------------- | ------------------------ | ---------- | ----------- | |  |  |  |  |  |