aodMerger: Special option to merge only folders of the same name

[sawenzel]

Adding a special merge-by-name option which asks the merger only to merge together dataframe folders of the same name.

This is needed only in special situations where we want to enfore the output structure of the AOD to be the same as that of a reference (data) AOD. An example is MC-DATA embedding.

[github-actions]

REQUEST FOR PRODUCTION RELEASES:
To request your PR to be included in production software, please add the corresponding labels called "async-" to your PR. Add the labels directly (if you have the permissions) or add a comment of the form (note that labels are separated by a ",")

+async-label <label1>, <label2>, !<label3> ...

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The following labels are available
async-2023-pbpb-apass4
async-2023-pp-apass4
async-2024-pp-apass1
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async-2024-ppRef-apass1
async-2024-PbPb-apass2
async-2023-PbPb-apass5

[sawenzel]

@fjonasALICE : As discussed

[alibuild]

Error while checking build/O2/fullCI_slc9 for d53ad16 at 2026-03-29 14:21:

## sw/BUILD/O2Physics-latest/log
c++: fatal error: Killed signal terminated program cc1plus
ninja: build stopped: subcommand failed.


## sw/BUILD/o2checkcode-latest/log
--
========== List of errors found ==========
++ GRERR=0
++ grep -v clang-diagnostic-error error-log.txt
++ grep ' error:'
++ GRERR=1
++ [[ 1 == 0 ]]
++ mkdir -p /sw/INSTALLROOT/45b2f71616eb78758fe4092e030330b97e548a18/slc9_x86-64/o2checkcode/1.0-local9/etc/modulefiles
++ cat
--

Full log here.

[jgrosseo]

Are you trying to achieve that DF folders are not merged?

In this case the option for that already exists, one has to put --max-size. We use it already on Hyperloop. Please don't merge this for now.