Increase timeout values in trigger test post-processing scripts

As observed recently, when the build or CI machine is overloaded, the trigger post-processing scripts may experience time-outs because they have low time-out thresholds. I'm increasing all 1-minute time-outs to 5m. Also making sure to redirect both stderr and stdout to the same log, to make it easier to understand.

This should resolve ATR-19660

cc @hartj