Add back L1_TRT_FILLED and L1_TRT_EMPTY to xml L1 menu

Mark Owenrequested to merge
markowen/athena:MO_master_21884 into master

Put back L1_TRT_FILLED and L1_TRT_EMPTY into xml L1 menu. This should fix https://its.cern.ch/jira/browse/ATR-21884.

Edited by Mark Owen

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