Some higher level filesystem utility

in particular a C++ way to get list files with globing

application to
* removal of tmp files in o2sim
* determining correct file input list for TPC chunked-digit merger

Some higher level filesystem utility

in particular a C++ way to get list files with globing

application to
* removal of tmp files in o2sim
* determining correct file input list for TPC chunked-digit merger

Generate header providing build-time ENABLE_UPGRADES status

If the O2 was built with ENABLE_UPGRADES, using installed headers dependin on the latter in the compiled macros
leads to the conflicts since the ACLIC is not aware of ENABLE_UPGRADES.
This PR will generate and install a header which defines ENABLE_UPGRADES if it was used at build-time.

Generate header providing build-time ENABLE_UPGRADES status

If the O2 was built with ENABLE_UPGRADES, using installed headers dependin on the latter in the compiled macros
leads to the conflicts since the ACLIC is not aware of ENABLE_UPGRADES.
This PR will generate and install a header which defines ENABLE_UPGRADES if it was used at build-time.

DPL Analysis: fix bug in unassigned grouping (AliceO2Group#6275)

DPL Analysis: fix bug in unassigned grouping (AliceO2Group#6275)

DPL Analysis: avoid instantiating HistFactory functions for each TU (A…

…liceO2Group#6302)

- move histogram creation code to HistogramSpec.cxx
- instantiate histogram creation templates only once

DPL Analysis: avoid instantiating HistFactory functions for each TU (A…

…liceO2Group#6302)

- move histogram creation code to HistogramSpec.cxx
- instantiate histogram creation templates only once

DPL: avoid dependency on boost for trivial stuff (AliceO2Group#6289)

DPL: cleanup AODReaderHelpers.cxx (AliceO2Group#6283)

RDataFrame is not actually needed.