PyUtils+AthenaPython: Update CORAL attribute access for python 3.

Update the handling of CORAL attributes to work with both py3 and py2. Can simplify it now using a pyroot template proxy. Also remove reference to izip, which doesn't exist in py3.

This merge request affects 2 packages:

• Control/AthenaPython
• Tools/PyUtils

Adding @ssnyder as watcher

added Core Tools master review-pending-level-1 labels

CI Result FAILURE (hash adde0b33)

	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 7435]

CI failing general problem, approving MR. Eric, L1

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

merged

mentioned in commit 4e0f1614

added sweep:ignore label

mentioned in commit msaimper/athena@c69fef85

mentioned in merge request !34132 (merged)