[EE] Refactor member view by using presenter

Rémy Coutablerequested to merge
ee-tmlee/gitlab-ce-28004-consider-refactoring-member-view-by-using-presenter into master

What does this MR do?

EE MR for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/15715

Are there points in the code the reviewer needs to double check?

There are EE-specific changes (member override) that are encapsulated in the ee/ folder.

Does this MR meet the acceptance criteria?

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