Add missing CA-based configuration of ZeroLifetimePositioner for G4AtlasAlg (ATLASSIM-6584)

Merged John Derek Chapman requested to merge jchapman/athena:FixATLASSIM-6584_23.0 into 23.0

Unlike the tests in ISF, did show a difference when running the canonical 50 events with and without the ZeroLifetimePositioner when quasi-stable particle simulation is enabled.

This merge request adds the ZeroLifetimePositioner configuration to the CA-based configuration of G4AtlasAlg.

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