Add postInclude for adding length integrator user action to a job

The other part of moving from !41650 (closed) (along with !41741 (merged)). It's a bit less clear to me here that having this as a PostInclude is necessarily the best way to add this tool. However, it wasn't clear to me how else to do it simply such that this can be added to an arbitrary simulation job; the other UserActions seem to get configured and added based on what overall Simulation config is selected (e.g. ATLFastII, ISF, etc) which doesn't seem like what we want to do for this one.

Possibly the actual implementation of this as a PostInclude can also be improved (I struggled to get the private tools to work in a simpler manner, but that is likely just due to my own lack of familiarity with the new CA-based approach).

cc @tadej @jchapman

added ITk Simulation labels

This merge request affects 1 package:

• Simulation/G4Utilities/G4UserActions

This merge request affects 2 files:

• Simulation/G4Utilities/G4UserActions/python/PostIncludes.py
• Simulation/G4Utilities/G4UserActions/python/init.py

Adding @jchapman as watcher

added master review-pending-level-1 labels

CI Result SUCCESS (hash b32600fd)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
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
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 30220]

Issue in optional test seems unrelated

Yes, it's a timeout. I have to tweak that test.

This looks fine to me so will approve now pending comments from @tadej and @jchapman. Tom - L1 shifter

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

resolved all threads

merged

mentioned in commit 4fd4ef58

added sweep:ignore label