[PWGCF] Request to pull the needed code for hyperloop

[CyF1rmiana]

Adding files for q2 calculation in PbPb_pass5.

[github-actions]

O2 linter results: ❌ 1 errors, ⚠️ 0 warnings, 🔕 0 disabled

[victor-gonzalez]

Thanks for moving forward this analysis!!
There are a few things that need to be addressed

• the header of the PR is meaningless. Could you please use instead something that reflects the functionality added?
• the source file/task name is ambiguous. Could you please use instead corrections? Just corre can be interpreted as correlations

Additionally, have you considered using the centralized Q vector production? They are produced from several detectors, several harmonics and they are corrected in different steps for different datasets. This is just a suggestion in case you want to consider it

[alibuild]

Error while checking build/O2Physics/o2 for f13db67 at 2025-06-27 11:35:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/11773-slc9_x86-64/0/PWGCF/Flow/Tasks/flowEseCorre.cxx:181:41: error: 'i' was not declared in this scope
ninja: build stopped: subcommand failed.

Full log here.

[victor-gonzalez]

And, please, never push code that has not been compiled and tested locally before
Central resources are scarce and shared. Please, help others