CAtoGlobalWrapper: return result of CA execution

Frank Winklmeierrequested to merge
fwinkl/athena:caglobal into 22.0

Make CAtoGlobalWrapper return the result of the CA execution to allow use by clients if needed.

Simplify the setup of the TrigDecisionTool by using this new feature. Also remove the unnecessary setting of configurableRun3Behavior in the example algorithm.

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