Bug: Control samples show up as 'Express' in Trailblazer

[Karl-Svard]

Describe the bug
Control cases show up as 'Express' priority in Trailblazer, no matter the level set in StatusDB. This is after a recent update that increased the priorities of the jobs on Hasta. See #3816

To Reproduce
Steps to reproduce the behavior:

1. Run any internal control case in prod or stage

Expected behavior
The priority of the TB analysis should be the same as the case in StatusDB. Another alternative is to add a brand new value like 'Control', but that might be better kept as a separate feature request.

Additional context

[Vince-janv]

Technical refinement

• Change the parameter slurm_quality_of_service in cg.apps.tb.api.TrailblazerAPI.add_pending_analysis to priority
• Create method called get_trailblazer_priority(case_id) which returns the priority to send to TB

    def get_trailblazer_priority(self, case_id: str) -> str:
        case: Case = self.status_db.get_case_by_internal_id(internal_id=case_id)
        priority: int = case.priority or Priority.research
        return map_to_trailblazer_priority(priority)

• Create a class TrailblazerPriority which is the same as the QOS one except it does not have maintenance
• Create a utils function that translate the int to the correct member of TrailblazerPriority
• Use get_trailblazer_priority in cg.apps.tb.api.TrailblazerAPI.add_pending_analysis to get the correct priority