TrigT1CaloFexPerf: remove usage of legacy flags in EmulationConfig

Legacy flags are not allowed to be used in CA. Remove the usage of ApplyEmulatedPedestal, which is True by default and not set anywhere else. If the configurability is really needed a new-style flags has to be in introduced.

Also delete now unused L1PerfControlFlags.

Closes ATR-28285. cc @will

This merge request affects 1 package:

• Trigger/TrigT1/L1CaloFEX/TrigT1CaloFexPerf

This merge request affects 2 files:

• Trigger/TrigT1/L1CaloFEX/TrigT1CaloFexPerf/python/EmulationConfig.py
• Trigger/TrigT1/L1CaloFEX/TrigT1CaloFexPerf/python/L1PerfControlFlags.py

Adding @bcarlson ,@will ,@damazio ,@thompson as watchers

added L1Calo Trigger main review-pending-level-1 labels

CI Result SUCCESS (hash 6fb84818)

	Athena
externals
cmake
make
tests

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Athena: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-EL9 4118]

removed review-pending-level-1 label

added review-approved label

mentioned in commit 997192f4

merged