Add worker to assign security bot for namespaces

...hestration_configuration_bot_management_for_namespaces.rb

config/sidekiq_queues.yml

ee/app/services/security/orchestration/assign_service.rb

ee/app/services/security/orchestration/unassign_service.rb

ee/app/workers/all_queues.yml

...stration_configuration_create_bot_for_namespace_worker.rb

...stration_configuration_remove_bot_for_namespace_worker.rb

...ec/services/security/orchestration/assign_service_spec.rb

.../services/security/orchestration/unassign_service_spec.rb

...iguration_bot_management_for_namespace_shared_examples.rb

...ion_configuration_create_bot_for_namespace_worker_spec.rb

...ion_configuration_remove_bot_for_namespace_worker_spec.rb

...y/unassign_redundant_policy_configurations_worker_spec.rb