[PWGJE] Use Precompiled headers for Jet Substructure tasks

[ktf]

No description provided.

[ktf]

@singiamtel @aalkin as discussed offline this is my suggestion for #14655.

[alibuild]

Error while checking build/O2Physics/o2 for 0ae8181 at 2026-01-29 13:51:

## sw/BUILD/O2Physics-latest/log
CMake Error at PWGJE/Tasks/CMakeLists.txt:11 (add_library):
CMake Error in PWGJE/Tasks/CMakeLists.txt:
CMake Error at PWGJE/Tasks/CMakeLists.txt:11 (add_library):

Full log here.

[nzardosh]

Hi @ktf you could also add the jetSubstructureHFOutput tasks as well since they are heavily templated. Then there are the tasks in the jet finder and matching folders too

[ktf]

Yes, I will do that in a separate PR, though. First we should all agree on the approach next Monday.

[singiamtel]

From WP{3,4,14} meeting:

On the overall O2Physics compilation using the PWGJE PCH we save ~2min on -j64, ~7.25min on -j16

[ktf]

Thanks. Can you provide the baseline as well?