AthenaCommon: Don't pass exctrace preload to subprocesses.

Scott Snyderrequested to merge
ssnyder/athena:exc.AthenaCommon-20220526 into 22.0

AthenaCommon: Don't pass exctrace preload to subprocesses.

Backported from master.

Non-athena jobs may not work correctly with exctrace. Remove it from the preload list for subprocesses.

See ATR-25610.

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