CLDC-2862: try destroying cron jobs on startup

config/initializers/sidekiq.rb

@@ -32,6 +32,7 @@ Redis.silence_deprecations = true
 
 Sidekiq.configure_server do |config|
   config.on(:startup) do
+    Sidekiq::Cron::Job.all(&:destroy)
     unless FeatureToggle.maintenance_mode_enabled?
       Sidekiq::Cron::Job.load_from_hash YAML.load_file("config/sidekiq_cron_schedule.yml")
     end
@@ -39,6 +40,5 @@ Sidekiq.configure_server do |config|
 
   config.on(:shutdown) do
     Sidekiq::CLI.instance.launcher.quiet
-    Sidekiq::Cron::Job.all(&:destroy)
   end
 end