Merge ms-ruby and ms-rails loggers

[ellnix]

Currently ms-ruby uses the Meilisearch::Utils.logger for logging while ms-rails uses Meilisearch::Rails.logger (which also uses Rail's own logger). It would be nice if we removed Meilisearch::Rails.logger logger and just set Meilisearch::Utils.logger to the Rails logger.

ms-ruby has an attr_writer on its logger which makes this possible.

[ellnix]

@wesharper Would you like to take a shot at this? It should be relatively straightforward.

[wesharper]

Sure thing