Deduplicate Geo cronjobs

What does this MR do?

Deduplicates Geo cronjobs.

The default deduplication setting is :until_executing. For cronjobs which are enqueued every minute, we can confidently take it a bit further and use :until_executed.

This should be slightly more efficient, and it should help some edge cases like #328057 (closed).

The modified classes are inherited in the following class files, as shown in grep output:

./ee/app/workers/geo/scheduler/primary/scheduler_worker.rb:      class SchedulerWorker < Geo::Scheduler::SchedulerWorker
./ee/app/workers/geo/scheduler/primary/per_shard_scheduler_worker.rb:      class PerShardSchedulerWorker < Geo::Scheduler::PerShardSchedulerWorker
./ee/app/workers/geo/scheduler/secondary/scheduler_worker.rb:      class SchedulerWorker < Geo::Scheduler::SchedulerWorker
./ee/app/workers/geo/scheduler/secondary/per_shard_scheduler_worker.rb:      class PerShardSchedulerWorker < Geo::Scheduler::PerShardSchedulerWorker
./ee/app/workers/geo/repository_sync_worker.rb:  class RepositorySyncWorker < Geo::Scheduler::Secondary::PerShardSchedulerWorker
./ee/app/workers/geo/registry_sync_worker.rb:  class RegistrySyncWorker < Geo::Scheduler::Secondary::SchedulerWorker
./ee/app/workers/geo/repository_verification/primary/shard_worker.rb:      class ShardWorker < Geo::Scheduler::Primary::SchedulerWorker
./ee/app/workers/geo/repository_verification/primary/batch_worker.rb:      class BatchWorker < Geo::Scheduler::Primary::PerShardSchedulerWorker
./ee/app/workers/geo/repository_verification/secondary/shard_worker.rb:      class ShardWorker < Geo::Scheduler::Secondary::SchedulerWorker
./ee/app/workers/geo/repository_verification/secondary/scheduler_worker.rb:      class SchedulerWorker < Geo::Scheduler::Secondary::PerShardSchedulerWorker
./ee/app/workers/geo/container_repository_sync_dispatch_worker.rb:  class ContainerRepositorySyncDispatchWorker < Geo::Scheduler::Secondary::SchedulerWorker
./ee/app/workers/geo/repository_shard_sync_worker.rb:  class RepositoryShardSyncWorker < Geo::Scheduler::Secondary::SchedulerWorker
./ee/app/workers/geo/file_download_dispatch_worker.rb:  class FileDownloadDispatchWorker < Geo::Scheduler::Secondary::SchedulerWorker

Resolves #328364 (closed)

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