Access sidekiq config using a non-deprecated way

to avoid deprecation warnings like
WARN: `config.options[:key] = value` is deprecated, use `config[:key] = value`

lib/dynflow/executors/sidekiq/core.rb

@@ -9,7 +9,7 @@
 Sidekiq.configure_server do |config|
   # Use semi-reliable fetch
   # for details see https://gitlab.com/gitlab-org/sidekiq-reliable-fetch/blob/master/README.md
-  config.options[:semi_reliable_fetch] = true
+  config[:semi_reliable_fetch] = true
   Sidekiq::ReliableFetch.setup_reliable_fetch!(config)
 end
 

lib/dynflow/rails/configuration.rb

@@ -100,15 +100,15 @@ def increase_db_pool_size?
       end
 
       def sidekiq_worker?
-        defined?(::Sidekiq) && ::Sidekiq.options[:queues].any?
+        defined?(::Sidekiq) && ::Sidekiq.configure_server { |c| c[:queues].any? }
       end
 
       def calculate_db_pool_size(world)
         return self.db_pool_size if self.db_pool_size
 
         base_value = 5
         if defined?(::Sidekiq)
-          Sidekiq.options[:concurrency] + base_value
+          Sidekiq.configure_server { |c| c[:concurrency] } + base_value
         else
           world.config.queues.values.inject(base_value) do |pool_size, pool_options|
             pool_size += pool_options[:pool_size]
@@ -152,7 +152,7 @@ def world_config
           # we can't do any operation until the Rails.application.dynflow.world is set
           config.auto_execute        = false
           config.auto_validity_check = false
-          if sidekiq_worker? && !Sidekiq.options[:queues].include?("dynflow_orchestrator")
+          if sidekiq_worker? && !Sidekiq.configure_server { |c| c[:queues].include?("dynflow_orchestrator") }
             config.delayed_executor = nil
           end
         end
@@ -192,7 +192,7 @@ def initialize_executor(world)
         if remote?
           false
         else
-          if defined?(::Sidekiq) && Sidekiq.options[:dynflow_executor]
+          if defined?(::Sidekiq) && Sidekiq.configure_server { |c| c[:dynflow_executor] }
             ::Dynflow::Executors::Sidekiq::Core
           else
             ::Dynflow::Executors::Parallel::Core