Enable more revive linter rules (#30608)

Noteable additions:

- `redefines-builtin-id` forbid variable names that shadow go builtins
- `empty-lines` remove unnecessary empty lines that `gofumpt` does not
remove for some reason
- `superfluous-else` eliminate more superfluous `else` branches

Rules are also sorted alphabetically and I cleaned up various parts of
`.golangci.yml`.

models/issues/review.go

@@ -345,11 +345,9 @@ func CreateReview(ctx context.Context, opts CreateReviewOptions) (*Review, error
 				return nil, err
 			}
 		}
-
 	} else if opts.ReviewerTeam != nil {
 		review.Type = ReviewTypeRequest
 		review.ReviewerTeamID = opts.ReviewerTeam.ID
-
 	} else {
 		return nil, fmt.Errorf("provide either reviewer or reviewer team")
 	}