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`.

services/user/delete.go

@@ -105,7 +105,6 @@ func deleteUser(ctx context.Context, u *user_model.User, purge bool) (err error)
 
 	if purge || (setting.Service.UserDeleteWithCommentsMaxTime != 0 &&
 		u.CreatedUnix.AsTime().Add(setting.Service.UserDeleteWithCommentsMaxTime).After(time.Now())) {
-
 		// Delete Comments
 		const batchSize = 50
 		for {