Clean-up ISF_Validation and ISF_ValidationMT ART syntax (changes test output)

Preparatory changes for !52397 (merged).

Some output changes expected as these changes switch on Frozen Showers by default in the updated jobs.

Tagging @bwynne

This merge request affects 2 packages:

• Simulation/Tests/ISF_Validation
• Simulation/Tests/ISF_ValidationMT

Affected files list will not be printed in this case

Adding @jchapman as watcher

added Simulation master review-pending-level-1 labels

CI Result SUCCESS (hash 0b686190)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
required tests
optional 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
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 52133]

added review-pending-level-2 label and removed review-pending-level-1 label

Changes and CI look fine from L1 point of view. Since it is beyond my expertise to judge wether these changes make sense will push to L2 for a quick review as well.

Kira (L1)

Looks good. Approving.

James (L2)

removed review-pending-level-2 label

added review-approved label

mentioned in commit ceb67e11

merged

added sweep:ignore label