Disable Sidekiq retries

ee/app/workers/concerns/geo/secondary/backfill_worker.rb

@@ -17,6 +17,8 @@ module Geo
         include ::Gitlab::Geo::LogHelpers
         include ::Gitlab::Utils::StrongMemoize
 
+        sidekiq_options retry: false
+
         attr_reader :shard_name, :start_time, :loops
       end
 

ee/spec/workers/geo/secondary/repository_backfill_worker_spec.rb

@@ -14,6 +14,14 @@ describe Geo::Secondary::RepositoryBackfillWorker, :geo, :geo_fdw, :clean_gitlab
     stub_healthy_shards(shard_name)
   end
 
+  it 'disables Sidekiq retries' do
+    expect(subject.sidekiq_options_hash).to eq(
+      'retry' => false,
+      'queue' => 'geo:geo_secondary_repository_backfill',
+      'queue_namespace' => :geo
+    )
+  end
+
   describe '#perform' do
     it 'does not schedule jobs when Geo database is not configured' do
       create(:project)