Fix python3 incompatible print statements (ATR-20980)

Several print statements in runHLT_standalone_run2.py were still in python2-only format. Have modified them to be python 3 compatible. Test now gets past this stage but fails due to ATR-20988.

added bugfix label

This merge request affects 1 package:

• Trigger/TriggerCommon/TriggerJobOpts

added Trigger master review-pending-level-1 labels

CI Result SUCCESS (hash b3016cd8)

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 10202]

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 2687698f

added sweep:ignore label