Change left join to inner join on historic_missions_units query (#678)

Resolve #677

Author: VincentAntoine

datascience/src/pipeline/queries/fmc/historic_missions_units.sql

@@ -2,6 +2,6 @@ SELECT
     m.ID_FMC_BC_MISSION AS mission_id,
     mu.IDC_FMC_MOYEN_CONTROLE AS control_unit_id
 FROM FMC2.FMC_BC_MISSION m
-LEFT JOIN FMC2.FMC_BC_MISSION_UNITE mu
+JOIN FMC2.FMC_BC_MISSION_UNITE mu
 ON m.ID_FMC_BC_MISSION = mu.ID_FMC_BC_MISSION
 WHERE m.DATE_DEBUT_MISSION < TO_DATE( '2023-01-01', 'YYYY-MM-DD')