Open Gitpod in `target=_blank` (Gitpod follow up)
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## Description
(Follow up from https://gitlab.com/gitlab-org/gitlab/-/merge_requests/37985#note_398380858)
The multi-action button component currently doesn't support `target="blank"`. Let's fix this so that Gitpod will open in a new tab since it forces the user to leave the current site.
issue