Use 'moderator' everywhere in CritiqueBrainz's codebase
Some pages on CritiqueBrainz use the term
moderator and some pages use
administrator. E.g., the page https://critiquebrainz.org/review/ae5156ba-923e-4199-bfa8-4aff814d1e3f (a deleted review) uses
administrator while the footer of the CB site uses
Moderators for users that can view deleted reviews.
Clean and update the CritiqueBrainz code so that only one of these terms are used to refer to this category of users as they are the same in the context of CritiqueBrainz.