load KFParticle package from a new official repository

The MR changes the KFParticle repository from "https://git.cbm.gsi.de/CbmSoft/KFParticle.git" to a new repository "https://github.com/cbmsw/KFParticle". This repository is a fork from the official KFParticle repository, that contains recent modifications made by CBM and ALICE.

The version currently used by cbmroot is tagged as "cbm/v1.1-1" ( that is "98712bbb2e2ae633e16a543ec38fea62a9ca2053" plus "external/KFParticle.patch" ). Later we can try to switch to the master branch.

The changes from KFParticle.patch are replaced by a corresponding ALICE commit from the master branch.