director-v2 mypy Part 3 followup

[GitHK]

Code refactoring is required for this one. The mixing idea is not idea. Better to create a utils module where to place this code.

src/simcore_service_director_v2/modules/dynamic_sidecar/scheduler/_core/_scheduler_mixin.py:40:13: error: "SchedulerInternalsMixin" has no attribute "_run_scheduler_task"; maybe "_scheduler_task"?  [attr-defined]
src/simcore_service_director_v2/modules/dynamic_sidecar/scheduler/_core/_scheduler_mixin.py:43:13: error: "SchedulerInternalsMixin" has no attribute "_run_trigger_observation_queue_task"; maybe "_trigger_observation_queue_task" or "_trigger_observation_queue"?  [attr-defined]
src/simcore_service_director_v2/modules/dynamic_sidecar/scheduler/_core/_scheduler_mixin.py:48:13: error: "SchedulerInternalsMixin" has no attribute "_cleanup_volume_removal_services"; maybe "_cleanup_volume_removal_services_task"?  [attr-defined]
src/simcore_service_director_v2/modules/dynamic_sidecar/scheduler/_core/_scheduler_mixin.py:51:15: error: "SchedulerInternalsMixin" has no attribute "_discover_running_services"  [attr-defined]