GeneratorFilters+ZDC_SimuDigitization: Use Accessor, etc instead of auxdata().

Replace auxdata, etc. with Accessor classes. Moving to deprecate these usages in the Athena build.

This merge request affects 2 packages:

• ForwardDetectors/ZDC/ZDC_SimuDigitization
• Generators/GeneratorFilters

Affected files list will not be printed in this case

Adding @xiaozhon ,@martindl ,@adbailey ,@jchapman as watchers

added Digitization ForwardDetectors Generators JetEtmiss Tau main review-pending-level-1 labels

CI Result SUCCESS (hash 75dd5868)

	Athena	AthGeneration
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-EL9 8854] (remote access info)

Looks good, approving --L1

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

merged

mentioned in commit 9c4c8131