[PWGLF] added nsigma ITS selections in the purity studies for li4. Fixed bug in the nuclei from hypertriton map#14273

maciacco merged 2 commits intoAliceO2Group:masterAliceO2Group/O2Physics:masterfrom

GiorgioAlbertoLucia:li4GiorgioAlbertoLucia/O2Physics:li4Copy head branch name to clipboard