Throttle some elasticsearch queues

To throttle these queues on the new sidekiq fleet, they need to have
the correct attribute set.

This will exclude them from our SLI for `low` and `high` urgency
queues.

ee/app/workers/all_queues.yml

@@ -27,7 +27,7 @@
 - :name: cronjob:elastic_index_bulk_cron
   :feature_category: :global_search
   :has_external_dependencies: 
-  :urgency: :low
+  :urgency: :throttled
   :resource_boundary: :unknown
   :weight: 1
   :idempotent: true
@@ -482,7 +482,7 @@
 - :name: elastic_commit_indexer
   :feature_category: :global_search
   :has_external_dependencies: 
-  :urgency: :low
+  :urgency: :throttled
   :resource_boundary: :unknown
   :weight: 1
   :idempotent: 
@@ -496,7 +496,7 @@
 - :name: elastic_indexer
   :feature_category: :global_search
   :has_external_dependencies: 
-  :urgency: :low
+  :urgency: :throttled
   :resource_boundary: :unknown
   :weight: 1
   :idempotent: 

ee/app/workers/elastic_commit_indexer_worker.rb

@@ -5,6 +5,7 @@ class ElasticCommitIndexerWorker # rubocop:disable Scalability/IdempotentWorker
 
   feature_category :global_search
   sidekiq_options retry: 2
+  urgency :throttled
 
   def perform(project_id, oldrev = nil, newrev = nil, wiki = false)
     return true unless Gitlab::CurrentSettings.elasticsearch_indexing?

ee/app/workers/elastic_index_bulk_cron_worker.rb

@@ -10,6 +10,7 @@ class ElasticIndexBulkCronWorker
 
   feature_category :global_search
   idempotent!
+  urgency :throttled
 
   def perform
     in_lock(self.class.name.underscore, ttl: 10.minutes, retries: 10, sleep_sec: 1) do

ee/app/workers/elastic_indexer_worker.rb

@@ -6,6 +6,7 @@ class ElasticIndexerWorker # rubocop:disable Scalability/IdempotentWorker
 
   sidekiq_options retry: 2
   feature_category :global_search
+  urgency :throttled
 
   def perform(operation, class_name, record_id, es_id, options = {})
     return true unless Gitlab::CurrentSettings.elasticsearch_indexing?