Manual sweep of !28252 from 21.3 to 21.0: Use only diff-root in regression test. Fixes ATLASSIM-4346

Use only diff-root in regression test. Fixes ATLASSIM-4346

See merge request !28252 (merged)

(cherry picked from commit 97ba4ff0)

7d75efe8 Use only diff-root in regression test. Fixes ATLASSIM-4346

added sweep:ignore label

mentioned in merge request !28252 (merged)

This merge request affects 1 package:

• Simulation/Tests/SimCoreTests

Adding @jchapman ,@vpascuzz as watchers

added 21.0 Simulation review-pending-level-1 labels

CI Result SUCCESS (hash b44b3f7c)

	Athena	AthDataQuality	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthDataQuality: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 41760]

Everything looks good, moving forward with approval. -L1

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

merged

mentioned in commit 263949cb

mentioned in merge request !28989 (merged)

mentioned in commit 1e705b32