TrigCost: retrieve menu from database in processing
In case of a missing menu json file retrieve it from the database.
Also, change the name of one histogram to more clear one.
DB access tested with file from TR run with CTP:
/eos/atlas/atlastier0/rucio/data_test/physics_Main/00386211/data_test.00386211.physics_Main.daq.RAW/data_test.00386211.physics_Main.daq.RAW._lb0003._SFO-5._0001.data