Generalized RateLimit logic to all indexers based on indexer id

Co-authored-by: Taloth Saldono <Taloth@users.noreply.github.com>

src/NzbDrone.Core/Indexers/HttpIndexerBase.cs

@@ -301,6 +301,8 @@ namespace NzbDrone.Core.Indexers
                 request.HttpRequest.RateLimit = RateLimit;
             }
 
+            request.HttpRequest.RateLimitKey = Definition.Id.ToString();
+
             request.HttpRequest.AllowAutoRedirect = true;
 
             return new IndexerResponse(request, _httpClient.Execute(request.HttpRequest));