GlobalSim: simplify dtermining whether a CalCell is a LAr strip

As title and JIRA ATR-30300 ATR-30300 @tamartin @sherwood

assigned to @peter

This merge request affects 1 package:

• Trigger/TrigT1/Global/GlobalSimulation

This merge request affects 2 files:

• Trigger/TrigT1/Global/GlobalSimulation/src/GlobalAlgs/EMB1CellsFromCaloCells.cxx
• Trigger/TrigT1/Global/GlobalSimulation/src/GlobalAlgs/EMB1CellsFromCaloCells.h

Adding @jchapman as watcher

added Trigger main review-pending-level-1 labels

CI Result SUCCESS (hash 2757743b)

	Athena
externals
cmake
make
tests

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Changes looks fine, CI passed, approving from L1 side.

removed review-pending-level-1 label

added review-approved label

merged

mentioned in commit 00071d42