Draft: Implement BulkDeleteRunnersByFilterWorker

What does this MR do and why?

Describe in detail what your merge request does and why.

This MR implements a worker to help with deleting runners in bulk by specifying a filter which gets passed to Ci::RunnersFinder. This will be used in !91471 (closed) to expose this functionality in a GraphQL mutation.

Part of Select individual runners to delete from the ad... (#339525 - closed)

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How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Ensure you have some runners registered using the following quick hack on the GDK Rails console:

   pry(main)> runner = Ci::Runner.new(runner_type: :instance_type, active: false).tap(&:save!)

2. Kick off BulkDeleteRunnersService, which will use Sidekiq to schedule the worker and give you back a job ID:

   pry(main)> ::Ci::Runners::BulkDeleteRunnersService.new(User.find(1), filter: { 'active' => false } ).execute
   => {:job_id=>"d4fbffb8d1564f106fce0348"}

3. Check log/sidekiq.log with tail log/sidekiq.log | grep BulkDeleteRunnersByFilterWorker:

   9 {"severity":"INFO","time":"2022-07-27T09:46:19.043Z","retry":3,"queue":"default","backtrace":true,"version":0,"args":["1","{\"active\"=\u003efalse}"],"class":"Ci::Runners::BulkDeleteRunnersByFilterWorker","jid":"78cfa1b110bd17c9f1373c9a","created_at":"2022-07-27T09:46:18.905Z","meta.feature_category":"runner_fleet","correlation_id":"6749adcbcac76b289f091500b74c7056","worker_data_consistency":"always","idempotency_key":"resque:gitlab:duplicate:default:ac49e54d8b327a517d13be23987c9f34243fd643b10cbd69525d62572f9b9803","size_limiter":"validated","enqueued_at":"2022-07-27T09:46:18.935Z","job_size_bytes":39,"pid":70319,"message":"Ci::Runners::BulkDeleteRunnersByFilterWorker JID-78cfa1b110bd17c9f1373c9a: start","job_status":"start","scheduling_latency_s":0.108728}

4. Confirm that the previous runner is no longer there:

   pry(main)> runner.reload
   ActiveRecord::RecordNotFound: Couldn't find Ci::Runner with 'id'=1214

5. Create some more runners. This time we'll delete them by id:

   pry(main)> runner = Ci::Runner.new(runner_type: :instance_type, active: false).tap(&:save!)

6. Kick off BulkDeleteRunnersService synchronously:

   pry(main)> ::Ci::Runners::BulkDeleteRunnersService.new(User.find(1), runners: [runner] ).execute
   => {:count=>1}

7. Confirm that the previous runner is no longer there:

   pry(main)> runner.reload
   ActiveRecord::RecordNotFound: Couldn't find Ci::Runner with 'id'=1215

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.